Unit 3 Trees and us
核心语法精练（现在进行时）
目录
A 考点概览·知识回顾 1
B 考点夯基·专项突破 3
一、单项选择 3
二、用所给单词的正确形式填空 9
三、完成句子 10
C 综合攻坚·能力跃升 2
题型一 语法填空 10
题型二 阅读理解 错误 ！未定义书签。
（一）用法：
1. 表示说话时正在进行的动作：
标志词：①now, right now, at the moment 等。
②动词 Look, Listen 等暗示词。
2. 表示目前一段时间内一直进行的动作:
标志词：these days, this week, at present 等时间状语。
（二）基本结构：
肯定句：主语 + am/is/are + 现在分词...
否定句：主语 + am/is/are + not + 现在分词...
一般疑问句：Am/Is/Are + 主语 + 现在分词...
肯定回答：Yes, 主语+ am/is/are.
否定回答：No, 主语+’m not / isn’t / aren’t.
特殊疑问句：疑问代词/疑问副词 + am/is/are + 主语 + 现在分词...
（三）现在分词变化规则：
第 1 页 共 16 页
1. 一般动词后直接加－ing 。如：work－working
2. 以不发音字母 e 结尾的动词，先去 e ，再加－ing 。如：live－living
3. 以重读闭音节结尾并且只有一个辅音字母的动词，双写尾字母，再加－ing 。如 ：swim- swimming
4. 以 ie 结尾的词，变 ie 为 y ，再加 ing 。 如：die—dying
一、单项选择
1 ．Listen! The girl ________ in her room. She sings very well.
A ．sings B ．will sing C ．is singing
(
【答案】
C
【详解】句意：听！那个女孩正在她的房间里唱歌。她唱得很好。
考查动词时态。根据句首的
“
Listen
!”
可知，此处强调动作正在发生，所以应该用现在进行时。故选
C
。
)
2 ．—Jim, someone _________ at the door.
—Mum, it must be my friend.
A ．knocks B ．was knocking C ．is knocking D ．will knock
(
【答案】
C
【详解】句意：
——
吉姆，有人在敲门。
——
妈妈，那一定是我的朋友。
考查动词时态。根据答句
“
Mum
,
it
must
be
my
friend
.”
可知，吉姆的妈妈正在和吉姆说话，此时有人正在敲
门，所以应该用现在进行时
is
knocking
。故选
C
。
)
3 ．—I can’t see Cindy here and there. Where is she now
—She is on the playground. She ________ ping-pong with her friends.
A ．plays B ．played C ．will play D ．is playing
(
【答案】
D
【详解】句意：
——
我到处都看不到辛迪。她现在在哪里？
——
她在操场上。她正在和她
的朋友们打乒乓
球。
考查动词时态。根据
“
I
can
’
t
see
Cindy
here
and
there
.
Where
is
she
now
”
可知，询问辛迪现在在哪里，回答
表明她在操场，由此推断她现在正在和朋友们打乒乓球，所以应该用现在进行时
is
playing
。故选
D
。
)
4 ．— What ______ your brother ______ now
第 2 页 共 16 页
— He’s reading a storybook.
A ．do; do B ．is; doing C ．does; do D ．will; do
(
【答案】
B
【详解】句意：
——
你哥哥现在正在做什么？
——
他正在读一本故事书。
考查现在进行时及特殊疑问句。根据
“
He
’
s
reading
a
storybook
.
”
可知，问句时态为现在进行时，其结构是
“
be
+
现在分词
”
；特殊疑问句的结构是
“
特殊疑问
词
+
be
+
主语
+
现在分词
+
其他
”
，主语
“
your
brother
”
是
第三人称单数，
be
动词用
is
，
do
的现在分词是
doing
，故选
B
。
)
5 ．I have to go now. My friends ________ outside.
A ．wait B ．waited C ．are waiting D ．were waiting
(
【答案】
C
【详解】句意：我现在必须走了，我的朋友正在外面等我。
考查现在进行时。根据
“
I
have
to
go
now
.
My
friends
...
outside
.”
可知，现在我要走了，
因为朋友正在外面等待，
可推测
“
我要离开
”
和
“
朋友在等我
”
为同时发生的事情，故后句时态用现在进行时，谓语用
“
am
/
is
/
are
+
现在
分词
”
的结构，主语为
“
My
friends
”
为第三人称复数，
be
动词用
are
，
waiting
为动词
wait
的现在分词。故选
C
。
)
6 ．Don’t make any noise. The baby ________ in the next room.
A ．is sleeping B ．sleeps C ．sleep D ．will sleep
(
【答案】
A
【详解】句意：不要制造任何噪音。婴儿正在隔壁房间睡觉。
考查现在进行时。
is
sleeping
正在睡觉，现在进行时；
sleeps
睡觉，一般现在时第三人称单数形式；
sleep
睡
觉，一般现在时；
will
sleep
将睡觉，一般将来时。根据语境可知，不要制造噪音，是因为婴
儿正在隔壁房
间睡觉，应该用现在进行时表示正在进行的动作
。故选
A
。
)
7 ．—May I use your computer
—Sorry. I ________ on it.
A ．work B ．am working C ．have worked D ．will work
(
【答案】
B
【详解】句意：
——
我可以用你的电脑吗？
——
抱歉。我正在上面工作。
考查动词的时态。
work
工作，一般现在时态；
am
working
正在工作，现在进行时态；
have
worked
已经工
作，现在完成时态；
will
work
将会工作，一般将来时态。根据
“
Sorry
. I...
on
it
.”
可知，拒绝借电脑是
因为当
)
第 3 页 共 16 页
(
前正在使用，需用现在进行时。故选
B
。
)
8 ．— Hi, Li Hua! How is the weather in Nanjing now
— It is terrible. It ________ all the morning.
A ．will rain B ．rain
C ．is raining D ．rains
(
【答案】
C
【详解】句意：
——
嗨，李华！南京现在的天气怎么样
？
——
太可怕了。整个早上都在下雨。
考查动词时态辨析。根据
“
It
is
terrible
.”
及
“
all
the
morning
”
可知，此处是
指当前整个上午都在下雨，应用现
在进行时，其基本结构为
am
/
is
/
are
+
doing
；主语为
“
it
”
，谓语用单数
。故选
C
。
)
9 ．Look! They ________ the school trip a lot at the moment.
A ．enjoy B ．are enjoying
C ．enjoys D ．enjoying
(
【答案】
B
【详解】句意：看！此刻他们正非常享受学校的旅行。
考查动词时态。根据句中
“
Look
!”
和
“
at
the
moment
”
可知，这两个词是现在进行时的标志，需用
“
be
动词
+
现
在分词
”
的结构，主语
“
They
”
是复数，
be
动词用
“
are
”
，
“
are
enjoying
”
符合语境，故选
B
。
)
10 ．—What’s your mother doing
— She ________ dinner in the kitchen.
A ．cook B ．cooks C ．is cooking D ．cooked
(
【答案】
C
【详解】句意：
——
你的妈妈正在做什么？
——
她正在厨房里做饭。
考查现在进行时。根据问句
“
What
is
your
mother
doing
”
可知，答
语需要用现在进行时来回应。主语
She
是
第三人称单数，所以
be
动词用
is
；
cook
的现在分词形
式是
cooking
，表示
“
她正在做饭
”
。故选
C
。
)
11．Look! The baby ________ happily. How lovely!
A ．smile B ．smiles C ．is smiling D ．smiled
(
【答案】
C
【详解】句意：看！这个宝宝正开心地笑着。多可爱啊！
考查动词时态辨析。根据句首
“
Look
!”
的提示，表示正在发生的动作，需用现在进
行时。主语是第三人称单
数，现在进行时结构为
“
is
+ V-
ing
”
。故选
C
。
)
第 4 页 共 16 页
12 ．My father and mother ________ TV now.
A ．watch B ．are watching C ．watches D ．is watching
(
【答案】
B
【详解】句意：我的爸爸和妈妈现在正在看电视。
考查现在进行时。
watch
观看，
动词原形；
are
watching
正在观看，用于复数主语；
watches
观看，
第三人
称单数形式；
is
watching
正在观看，用于第三人称单数主语。句中的
“
now
”
是现在进行时的标志
性时间状语，
说明动作正在进行，所以句子用现在进行时，其结构为
“
主语
+
be
动词
+
现在分词
+
其他
”
；主语
“
My
father
and
mother
”
是复数，因此
be
动词用
“
are
”
，
watch
”
的现在分词是
“
watching
”
。故选
B
。
)
13 ．—Excuse me, what are the students doing
—They ________ flowers outside.
A ．waters B ．is watering C ．are watering D ．has watered
(
【答案】
C
【详解】句意：
——
打扰一下，请问学生们在
做什么？
——
他们正在外面给花浇水。
考查现在进行时。根据
“
Excuse
me
,
what
are
the
students
doing
”
可知，时态是现在进行
时，主语
“
They
”
是复
数。故选
C
。
)
14 ．Look! Some children ________ litter in the park.
A ．collect B ．collects C ．are collecting
(
【答案】
C
【详解】句意：看
！一些孩子正在公园里收集垃圾。
考查现在进行时。根据
“
Look
!”
可知，此句时态为现在进行时，其结构为
“
am
/
is
/
are
doing
”
。故选
C
。
)
15 ．Mary can dance well. She is ________ on the playground now.
A ．dance B ．dances C ．dancing
(
【答案】
C
【详解】句意：
Mary
跳舞跳得很好。她现在正在操场上跳舞。
考查动词时态。根据
“
now
”
可知，描述正在进行的动作，故要用现在进行时：
am
/
is
/
are
doing
。故选
C
。
)
16 ．—What’s the sound, Sam
—I ________ to the radio, Mum.
A ．listened B ．am listening C ．listen D ．will listen
(
【答案】
B
)
第 5 页 共 16 页
(
【详解】句意：
——
萨姆，什么声音？
——
妈妈，我正在听收音机呢。
考查动词时态辨析。
listened
动词过去式；
am
listening
现在进行时；
listen
动词原形；
will
listen
一般将来时。
根据问句可知，是在询问当下正在发生的声音，回答需用现在进行时结构
“
be
动词
+
现在分词
”
。故选
B
。
)
17 ．—Where’s your father
—He ________ in the living room.
A ．is reading B ．reads C ．read
(
【答案】
A
【详解】句意：
——
你爸爸在哪？
——
他正在客厅看书。
考查现在进行时。根据问句询问父亲现在的位置，答句应描述父亲正在进行的动作，需用现在进行时（
be
doing
）结构。故选
A
。
)
18 ．—Mum, where is Dad
—He ________ the car in the yard. Go and help him.
A ．washes B ．is washing C ．washed
(
【答案】
B
【详解】句意：
——
妈妈，爸爸在哪里？
—
—
他正在院子里洗车。去帮帮他。
考查时态。根据
“
Go
and
help
him
.”
可知，此处表示爸爸洗车的动作正在发生，
孩子需要去帮忙。故选
B
。
)
19 ．When you are _________, pay attention to the traffic lights.
A ．drive B ．drives C ．driving D ．drove
(
【答案】
C
【详解】句意：当你正在开车时，要注意交通信号灯。
考查现在进行时。根据
“
you
are
”
可知，此处时态为现在进行时，结构为
are
doing
，指
正在开车时，空处填
动词现在分词的
driving
。故选
C
。
)
20 ．—Peter, what are you doing
—Oh, I ________ history.
A ．will study B ．am studying C ．studies
(
【答案】
B
【详解】句意：
——
Peter
，你在做什么？
——
哦，我在学习历史。
考查时态。
will
study
一般将来时；
am
studying
现在进行时；
studies
一般现在时。问句
“
what
are
you
doing
”
是现在进行时，答句时态要一致，因此也用
现在进行时。故选
B
。
)
第 6 页 共 16 页
二、用单词的正确形式填空
21 ．Look! The workers (check) the electrical wires.
(
【答案】
are
checking
【详解】句意：看
！工人们正在检查电线。根据
“
Look
!”
可知，此句时态为现在进行时
，结构为
am
/
is
/
are
doing
。主语为
“
The
workers
”
，
be
动词用
are
；
check
“
检查
”
，动词，现在分
词为
checking
。故填
are
checking
。
)
22 ．Look! The children (play) a treasure hunt game in the yard.
(
【答案】
are
playing
【详解】句意：看！孩子们正在院子里玩寻宝游戏。
“
Look
!”
是现在进行时的标志词，结构为
“
be
+
现在分
词
”
，主语
“
The
children
”
是复数，
be
动词用
“
are
”
，
“
play
”
的现在分词是
“
playing
”
。
故填
are
playing
。
)
23 ．She is (write) a letter to her friend now.
(
【答案】
writing
【详解】句意：她正在给朋友写信。
由
now
可知是现在进行时，表示现在正在进行时的动作，结构是
be
doing
，故用现在分词
writing
。故填
writing
。
)
24 ．We (wait) for the arrival of our guests now.
(
【答案】
are
waiting
【详解】句意：我们正在等客人的到来。
wait
“
等待
”
，根据
“
now
”
可
知，该句是现在进行时，其结构为
“
am
/
is
/
are
doing
”
，主语是
“
We
”
，
be
动词填
are
，动词改为现在分词
waiting
。故填
are
waiting
。
)
25 ．A lot of girls (sing) under the tree over there. Who are they
(
【答案】
are
singing
【详解】句意：那边的树下有很多女孩在唱歌。她们是谁呢？根据
“
Alot
of
girls
…
under
the
tree
over
there
”
可判断，此处表示正在树下唱歌，用现在进行时
be
doing
的结构，主语
“
Alot
of
girls
”
是复数形式，
be
用
are
，故填
are
singing
。
)
26 ．They are (watch) TV now.
(
【答案】
watching
【详解】句意：他们现在正在看电视。根据
“
now
”
可知，时态是现在进行时，空处用现在分词与
are
构成现
在进行时结构。故填
watching
。
)
27 ．Look! They (take) care of the trees. They are watering them.
(
【答案】
are
taking
【详解】句意：看！他们正在照料树木。他们正在给它们浇水。根据
“
Look
!
”
可知，句子时态为现在进行时，
)
第 7 页 共 16 页
(
结构为：
be
+
现在分词，主语
they
为复数，
be
动词用
are
，动词
take
的现在分词为
taking
。故填
are
taking
。
)
28 ．Look! Joan (jog) along the river with her dog now!
(
【答案】
is
jogging
【详解】句意：看！琼现在正和她的狗沿着河边慢跑！根据
“
Look
!”
可知，句子时态为现在进行时，主语是
“
Joan
”
，
be
动词用
is
。故填
is
jogging
。
)
29 ．—Where is Helen
—I’m not sure. Maybe she (have) her baseball lesson.
(
【答案】
is
having
【详解】句意：
——
海伦在哪里？
——
我不确定。也许她正在上棒球课。根据
“
Where
is
Helen
”
可知，此
处应该回答海伦现在正在做什么，用现在进行时，主语是
“
she
”
，
be
动词用
is
，动词用现在分词
having
。故
填
is
having
。
)
30 ．Some of my classmates (walk) to school now.
(
【答案】
are
walking
【详解】句意：我的一些同学现在正在步行去学校。句中缺少谓语动词，时间状语
now
表
明动作正在进行，
应用现在进行时；主语
Some
of
my
classmates
是复数，
be
动词用
are
，
walk
的现在分词是
walking
，整体在
句中作谓语。故填
are
walking
。
)
三、完成句子
31 ．They are playing badminton now. (对画线部分提问) are they now
(
【答案】
What
doing
【详解】句意：他们现在正在打羽毛球。画线部分是正在进行的动作，对正在进行的动作提问用
“
What
is
/
are
sb
doing
”
结构。故填
What
；
doing
。
)
32 ．李华一家人正在公园里野餐。
Li Hua’s family a picnic in the park.
(
【答案】
is
having
【详解】根据汉语提示可知，时态用现在进行
时。主语是
Li
Hua
’
s
family
，作为一个整体时通常视为单数，
谓语动词用单数形式
is
；
have
a
picnic
是固定短语，意为
“
野餐
”
，进
行时态中需变为
having
。故填
is
；
having
。
)
33 ．他们正在整理房间。
第 8 页 共 16 页
They the room.
(
【答案】
are
tidying
up
【详解】对比中英文可知，空处缺少
“
整理
”
，其英文表达为
tidy
up
，固定搭配；句子时态是现在进行时。
结构是：
be
动词
+
动词
ing
，
they
是复数人称，
be
动词用
are
。故填
are
；
tidying
；
up
。
)
34 ．我正在为聚会购买一些水果。
I some fruits for the party.
(
【答案】
am
buying
【详解】
buy
“
购买
”
，根据中文提示可知，本句是现在进行时，结构为
am
/
is
/
are
doing
，主语是
I
，
be
用
am
。
故填
am
；
buying
。
)
35 ．他们正在安静地画画。 They are quietly .
(
【答案】
painting
pictures
【详解】根据中英文对照可知，此处缺
“
画画
”
，英文表
达为
“
paint
pictures
”
，根据
“
are
quietly
”
可知，句子用
现在进行时，动词用现在分词形式。故填
painting
pictures
。
)
36 ．He runs every morning. (句型转化)
now.
(
【答案】
He
is
running
【详解】句意：他每天早上跑步。根据
“
now
”
可知，时态为现在进行
时，结构为
be
doing
，主语为
he
，
be
动词用
is
，
run
的现在分词为
running
。故填
He
；
is
；
running
。
)
37 ．The girl is reading a book.（对划线部分提问） is the girl
(
【答案】
What
doing
【详解】句意：这个女孩正在读书。划线部分为
“
reading
a
book
”
，表示正在进行的动作，用疑
问词
what
来
提问
“
正在做什么
”
，原句时态是现在进行时，结构为
“
be
+
doing
”
，在疑问句中，
be
动词
is
要提前，动词用
doing
，故填
What
；
doing
。
)
38 ．我正在打包我的衣服准备旅行。
I my clothes for the trip.
(
【答案】
am
packing
【详解】根据句意可知，此处表示
“
正在打包
”
，用现在进行时
“
be
动词
+
动
词的现在分词
”
结构，
“
pack
”
意为
)
第 9 页 共 16 页
(
“
打包
”
，其现在分词是
“
packing
”
，主语是
“I”
，对应的
be
动词是
“
am
”
。故填
am
；
packing
。
)
39 ．一些孩子正在堆雪人，另一些孩子正在雪中玩耍。 Some kids snowmen. Others in the snow.
(
【答案】
are
making
are
playing
【详解】根据语境可知，描述的是正在发生的动作，时态用现在进行时，其结构为
“
am
/
is
/
are
+
动词的现在
分词
”
。
“
堆雪人
”
是
make
snowmen
，主语
“
Some
kids
”
是复数，
be
动词用
are
，
make
的现在分词
是
making
；
“
玩耍
”
是
play
，主语
“
Others
”
也是复数，
be
动词用
are
，
“
play
”
的现在分词是
playing
。故填
are
making
；
are
playing
。
)
40 ．我正在听一首英文歌。
I am an English song.
(
【答案】
listening
to
【详解】
listen
to
“
听
”
，动词短语；句子时态为现在进行时，其结构为
“
am
/
is
/
are
doing
”
。故填
listening
；
to
。
)
题型一 语法填空
阅读下面短文，根据语境或所给单词的提示，在每个空格内填入恰当的词，要求所填的词意义准确、形式正确，使短文意思完整、行文连贯。
Trees are important to us. They do a lot for our environment (环境) and animals.
Trees help to keep the air clean and make us 1 (health). They take in dirty air and give clean air to us. Go for 2 walk in the park in the morning, and you can feel how nice it is to be with many trees and clean air.
Trees give people many kinds of beautiful flowers and delicious fruits 3 apples and oranges. Trees also give different animals and birds homes. They are even 4 (real) good places for animals to save food for winter months.
Trees are very 5 (help). People use them in many ways. They cut down ( 砍倒) trees to make paper, desks and chairs. They also use trees to build houses and shops. But 6 (use) is hurting (伤害). Cutting down too many trees is bad for nature. 7 of this, many animals lose (失去) their homes.
It is time for us 8 (stop) hurting our great friends—trees. Don’t use so much paper and take part in tree- planting 9 (activity). All of us should do something for 10 (we) dear friends!
第 10 页 共 16 页
(
【答案】
1
．
healthy
2
．
a 3
．
like
4
．
really
5
．
helpful
6
．
using 7
．
Because 8
．
to
stop 9
．
activities
10
．
our
【导语】本文是一篇说明文，主要介绍了树木的作用，呼吁人们保护树木。
1
．句意：树木有助于保持空气清洁，使我们健康。根据
“
make
us
...”
可知，此处应填形容
词作宾语补足语。
故填
healthy
。
2
．句意：早上在公园里散步，你会感到和许多树和干净的空气在一
起是多好。
go
for
a
walk
“
去散步
”
。故
填
a
。
3
．句意：树给了人们提供各种漂亮的花和美
味的水果，像苹果和橘子。此处
fruits
后
apples
and
oranges
表
示举例
“
像
”
。故填
like
。
4
．句意：他们对动物们来说确实是个储存食物过冬的好地方。此处修饰
good
，应用副词
really
。故填
really
。
5
．句意：树木是非常有帮助的。空前
are
，此次用形容词
helpful
“
有帮助的
”
。故填
helpful
。
6
．句意：但是使用正在造成伤害。空后
is
，可知此处用名词，用动名词
using
。故填
using
。
7
．句意：因为这个，许多动物失去了他们的家园。
because
of
“
因为
”
，首字母大写。故填
Because
。
8
．句意：是时候停止伤害我们的好朋友
——
树木了。
it
’
s
time
for
sb
.
to
do
sth
“
是某人做某事的时候了
”
。故
填
to
stop
。
9
．句意：不要用太多的纸，并且参加植树活动。
activity
是可数名词，此处表泛指应用复数形式
activities
。
故填
activities
。
10
．句意：我们所有人都应该为我们亲爱的朋友做些事情。根据空后名词
friends
可知，用形容词性物
主代
词。故填
our
。
)
语法填空
Trees are everywhere around us, but we often don’t care about them. These 1 (silence) friends are very important for all the living things on Earth. Forests are full 2 different animals, insects and plants. They are like homes for them.
Trees are like air cleaners in nature. They take in bad greenhouse gases, like carbon dioxide, and give out oxygen. So they help make the air 3 (clean) for everyone on the earth.
Trees are important for nature, and they also make our 4 (day) lives better and 5 (convenient). Many things we use every day, like paper and pencils, and most of the furniture in our homes, come from trees.
第 11 页 共 16 页
Also, trees give us lots of yummy fruits and nice drinks. For example, we can make tea with the 6 (leaf) of tea
trees.
7 (sad), people are hurting trees. People 8 (cut) down a lot of trees around the world, and air and water pollution is making things worse for trees. These problems are really bad for 9 (we) environment.
It’s time for us to do something. We must work harder 10 (protect) trees. Trees are important for our lives now and the future of our planet.
(
【答案】
1
．
silent
2
．
of
3
．
clean
4
．
daily
5
．
more
convenient
6
．
leaves
7
．
Sadly
8
．
are
cutting
9
．
our
10
．
to
protect
【导语】本文是一篇说明文，主要讲述了树木的重要性，包括对地球生物的重
要性、对日常生活的改善，
同时指出人们砍伐树木以及环境污染对树木造成的伤害，呼吁人们要更加努力地保护树木。
1
．句意：这些安静的朋友对地球上所有的生物都非常重要。根据
“
Trees
are
everywhere
around
us
,
but
we
often
don
’
t
care
about
them
.”
可知，这里描述树木的特点，
silence
是名词，
“
silent
”
是其形容词，意为
“
安静
的
”
，修饰名词
“
friends
”
，符合语境。故填
silent
。
2
．句意：森林里充满了不同的动物、
昆虫和植物。
“
be
full
of
”
意为
“
充满
”
，所以此处应用
“
of
”
。故填
of
。
3
．句意：所以它们有助于让地球上的每个人都能呼吸到清
洁的空气。
“
make
sth
. +
形容词
”
表示
“
使某物处
于某种状态
”
，
“
clean
”
本身就有
“
干净的，清洁的
”
意思，说明树木能让空气保持清洁的状态。故填
clean
。
4
．句意：树木对自然很重要，它们也让我们的日常生活更好、更方便。
“
day
”
是名词，
“
daily
”
是形容词，
意为
“
日常的
”
，
“
daily
lives
”
表示
“
日常生活
”
，符合语境。故填
daily
。
5
．句意：树木对自然很重要，它们也让我们的日常生活更好、更方便。
“
better
”
提示这里要用比较级，
“
convenient
”
是多音节形容词，其比较级是
“
more
convenient
”
，表示
“
更方便的
”
。故
填
more
convenient
。
6
．句意：例如，我们可以用茶树的叶子泡
茶。
“
leaf
”
是可数名词，这里指茶树的所有叶子，要用复数形式，
“
leaf
”
的复数是
“
leaves
”
。故填
leaves
。
7
．句意：可悲的是，人们正在伤害树木。
sad
“
伤
心的
”
，形容词，
“
sadly
”
是副词，意为
“
可悲地，伤心地
”
，
在句首作状语，修饰整个句子，符合语境。故填
Sadly
。
8
．句意：全世界的人们正在砍伐大量树木，并且空气和水
污染正让树木的情况变得更糟。根据
“
and
air
and
water
pollution
is
making
things
worse
for
trees
”
可知，这里用现在进行时，表示正在进行的动作，其结构是
“
be
+
动词的现在分词
”
，主语
“
People
”
是复数，
“
cut
”
的现在分词是
“
cutting
”
，所
以填
“
are
cutting
”
。故填
are
)
第 12 页 共 16 页
(
cutting
。
9
．句意：这些问题真的对我们的环境有害。
“
environment
”
是名词，前面要用形容词性物主代词修饰
，
“
we
”
是人称代词主格，其形容词性物主代词是
“
our
”
，表示
“
我们的
”
。故填
our
。
10
．句意：我们必须更加努力地保护树木。
“
work
hard
to
do
sth
.”
意为
“
努力做某事
”
，所以此处用动词不定
式
“
to
protect
”
作目的状语。故填
to
protect
。
)
题型二 阅读理解
Scientists have found that plants can make sounds.
A scientist named Lily Hadany and her team recorded (录制) tomato plants at different times. It showed that the plants made ultrasonic (超声波) sounds. Humans could only hear them with the help of a computer. They were noises like clicking (哒声) sounds.
As the scientists studied the sounds, they began to find some interesting facts. Plants made different sounds at different times. They hardly clicked when they had enough water, but as the earth got drier, they clicked more and more. Scientists also found that plants made sounds when they got hurt. When scientists cut off a leaf from the plants, the plants also clicked more. But the clicking wasn’t the same as that when the plants needed water.
Some scientists trained a computer AI system to identify (辨别) the different kinds of clicking sounds. It was able to find the difference between plants that needed water and plants with cuts. It means that one day we may be able to use these sounds to figure out when a plant is in a difficult time, and what problem it is having. That could be very helpful to farmers.
The team’s finding changes our ideas about plants. As Dr. Hadany says, “Even in a quiet field, there are sounds made by plants, and those sounds carry information and may help us a lot.”
1 ．If you want to hear the sounds of plants, which of the following may you need
A ． B．
C ． D ．
2 ．How does the writer show the interesting facts in Paragraph 3
A ．By giving examples. B ．By telling stories.
第 13 页 共 16 页
C ．By asking questions. D ．By using numbers.
3 ．What does “figure out” mean in Paragraph 4
A ．Think about. B ．Put out. C ．Find out. D ．Care about.
4 ．What can people do with the help of the team’s finding
A ．Stop people from cutting down trees.
B ．Hear more beautiful sounds from different plants.
C ．Know how to identify different sounds faster.
D ．Help farmers to know more about their plants.
(
【答案】
1
．
B 2
．
A 3
．
C
4
．
D
【导语】本文主要讲述了科学家发现植物能够发出声音，并进行分析
，并由此训练了一个
AI
智能系统来
识别不同种类的声音，这对农民是很有帮助的。
1
．细节理解题。根据
“
Humans
could
only
hear
them
with
the
help
of
a
computer
.”
可知，人们想要听
到植物的
声音，需要通过电脑。故选
B
。
2
．细节理解题。根据
“
As
the
scientists
studied
the
sounds
,
they
began
to
find
some
interesting
facts
.”
可知，作
者通过举例的方法说明一些有意思的事实。故选
A
。
3
．词义猜测题。根据
“
It
means
that
one
day
we
may
be
able
to
use
these
sounds
to
…
a
plant
is
in
a
difficult
time
,
and
what
problem
it
is
having
. ”
可知，此处表达我们可能通过这些声音来弄清楚它什么时候处于困难时期，
以及它遇到了什么问题。
figure
out
“
弄清楚
”
。故选
C
。
4
．细节理解题。根据
“
Even
in
a
quiet
field
,
there
are
sounds
made
by
plants
,
and
those
sounds
carry
information
and
may
help
us
a
lot
.”
可知，植物的声音可以帮助农民更多的了
解植物。故选
D
。
)
① Gardening (园艺) is popular in many parts of the world. It brings us beautiful flowers, fresh fruit and vegetables. But you can get more from your garden.
② Gardening helps to keep healthy. Today’s people sit indoors ( 室 内) for too long and don’t get much exercise. When you garden, you have to move a lot. It’s a good chance for you to exercise your body by watering flowers or doing some digging. And when you are in your garden, you can feel the warm sunshine. This means you are getting Vitamin D ．It helps your bodies use calcium (钙), and it keeps your bones (骨骼) strong.
③ ▲ It gets them off the computer, TV and phone. Gardening can be a great teacher to teach children about nature and healthy eating. It can also help them to understand the meaning of “No pains, no gains” .
第 14 页 共 16 页
④ Gardening is a great way to meet people and build friendship. When you are gardening, you are outdoors. So it is a perfect time to talk with your neighbors (邻居). Most people love to talk about their hobbies, and so do gardeners. They usually enjoy showing people what they are growing. And most enjoy sharing advice and stories about their gardens.
1 ．When it’s ________ you can get Vitamin D in your garden.
A ．sunny B ．cloudy C ．snowy D ．rainy
2 ．Which of the following can be the best for ▲ in Paragraph 3
A ．Gardening will be good for your bones. B ．Gardening may help people to feel happy.
C ．Gardening is a great activity to do with children. D ．Gardening can be a good way to meet neighbors.
3 ．Which is the best title (题目) of the passage
A ．Keep Healthy B ．Enjoy Gardening C ．Outdoor Activities D ．Friendship with Neighbors
4 ．What is the structure (结构) of the passage
A ． B ． C ． D ．
(
【答案】
1
．
A 2
．
C 3
．
B
4
．
C
【导语】本文介绍了园艺在世界许多地方都很受欢迎，园艺不仅能带来美丽的花朵、新鲜
的果蔬，还能让
人保持健康、教育孩子、结识朋友。
1
．细节理解题。根据第二段
“
And
when
you
are
in
your
garden
,
you
can
feel
the
warm
sunshine
.
This
means
you
are
getting
Vitamin
D
.”
可知，当天气晴朗，在花园里能感受到温暖的阳光时，就能获取维生素
D
。故选
A
。
2
．推理判断题。根据第三段
“
It
gets
them
off
the
computer
,
TV
and
phone
.
Gardening
can
be
a
great
teacher
to
teach
children
about
nature
and
healthy
eating
.”
可知，本段主要讲述了园艺能让孩子们远离电子设备，还能教
孩子们关于自然和健康饮食的知识，所以本段主要说的是园艺是和孩子们一起做的一项很棒
的活动。选项
C“
园艺是和孩子们一起做的一项很棒的活
动
”
符合语境。故选
C
。
3
．最佳标题题。根据第一段
“
Gardening
(
园艺
)
is
popular
in
many
parts
of
the
world
.
It
brings
us
beautiful
flowers
,
fresh
fruit
and
vegetables
.
But
you
can
get
more
from
your
garden
.”
以及全文内容可知，本文主要介绍
了园艺的好处，鼓励人们享受园艺。选项
B“
享受园艺
”
符合主题。故选
B
。
4
．篇章结构题。根据第一段
“
Gardening
(
园艺
)
is
popular
in
many
parts
of
the
world
.
It
brings
us
beautiful
)
第 15 页 共 16 页
flowers, fresh fruit and vegetables. But you can get more from your garden.”可知，第一段总述园艺在世界许多地方都很受欢迎，且能从花园里得到更多；根据第二段“Gardening helps to keep healthy.” 、第三段“It gets them off the computer, TV and phone. Gardening can be a great teacher to teach children about nature and healthy eating.”以及第四段“Gardening is a great way to meet people and build friendship.”可知，第二、三、四段分别从保持健康、教育孩子、结识朋友三个方面介绍了园艺的好处。所以文章结构为总分结构，即①/②③④。故选 C。
第 16 页 共 16 页Unit 3 Trees and us
核心语法精练（现在进行时）
目录
A 考点概览·知识回顾 1
B 考点夯基·专项突破 3
一、单项选择 3
二、用所给单词的正确形式填空 9
三、完成句子 10
C 综合攻坚·能力跃升 2
题型一 语法填空 5
题型二 阅读理解 错误 ！未定义书签。
（一）用法：
1. 表示说话时正在进行的动作：
标志词：①now, right now, at the moment 等。
②动词 Look, Listen 等暗示词。
2. 表示目前一段时间内一直进行的动作:
标志词：these days, this week, at present 等时间状语。
（二）基本结构：
肯定句：主语 + am/is/are + 现在分词...
否定句：主语 + am/is/are + not + 现在分词...
一般疑问句：Am/Is/Are + 主语 + 现在分词...
肯定回答：Yes, 主语+ am/is/are.
否定回答：No, 主语+’m not / isn’t / aren’t.
特殊疑问句：疑问代词/疑问副词 + am/is/are + 主语 + 现在分词...
（三）现在分词变化规则：
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1. 一般动词后直接加－ing 。如：work－working
2. 以不发音字母 e 结尾的动词，先去 e ，再加－ing 。如：live－living
3. 以重读闭音节结尾并且只有一个辅音字母的动词，双写尾字母，再加－ing 。如 ：swim- swimming
4. 以 ie 结尾的词，变 ie 为 y ，再加 ing 。 如：die—dying
一、单项选择
1 ．Listen! The girl ________ in her room. She sings very well.
A ．sings B ．will sing C ．is singing
2 ．—Jim, someone _________ at the door.
—Mum, it must be my friend.
A ．knocks B ．was knocking C ．is knocking D ．will knock
3 ．—I can’t see Cindy here and there. Where is she now
—She is on the playground. She ________ ping-pong with her friends.
A ．plays B ．played C ．will play D ．is playing
4 ．— What ______ your brother ______ now
— He’s reading a storybook.
A ．do; do B ．is; doing C ．does; do D ．will; do
5 ．I have to go now. My friends ________ outside.
A ．wait B ．waited C ．are waiting D ．were waiting
6 ．Don’t make any noise. The baby ________ in the next room.
A ．is sleeping B ．sleeps C ．sleep D ．will sleep
7 ．—May I use your computer
—Sorry. I ________ on it.
A ．work B ．am working C ．have worked D ．will work
8 ．— Hi, Li Hua! How is the weather in Nanjing now
— It is terrible. It ________ all the morning.
A ．will rain B ．rain
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C ．is raining D ．rains
9 ．Look! They ________ the school trip a lot at the moment.
A ．enjoy B ．are enjoying
C ．enjoys D ．enjoying
10 ．—What’s your mother doing
— She ________ dinner in the kitchen.
A ．cook B ．cooks C ．is cooking D ．cooked
11．Look! The baby ________ happily. How lovely!
A ．smile B ．smiles C ．is smiling D ．smiled
12 ．My father and mother ________ TV now.
A ．watch B ．are watching C ．watches D ．is watching
13 ．—Excuse me, what are the students doing
—They ________ flowers outside.
A ．waters B ．is watering C ．are watering D ．has watered
14 ．Look! Some children ________ litter in the park.
A ．collect B ．collects C ．are collecting
15 ．Mary can dance well. She is ________ on the playground now.
A ．dance B ．dances C ．dancing
16 ．—What’s the sound, Sam
—I ________ to the radio, Mum.
A ．listened B ．am listening C ．listen D ．will listen
17 ．—Where’s your father
—He ________ in the living room.
A ．is reading B ．reads C ．read
18 ．—Mum, where is Dad
—He ________ the car in the yard. Go and help him.
A ．washes B ．is washing C ．washed
19 ．When you are _________, pay attention to the traffic lights.
A ．drive B ．drives C ．driving D ．drove
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20 ．—Peter, what are you doing
—Oh, I ________ history.
A ．will study B ．am studying C ．studies
二、用单词的正确形式填空
21 ．Look! The workers (check) the electrical wires.
22 ．Look! The children (play) a treasure hunt game in the yard.
23 ．She is (write) a letter to her friend now.
24 ．We (wait) for the arrival of our guests now.
25 ．A lot of girls (sing) under the tree over there. Who are they
26 ．They are (watch) TV now.
27 ．Look! They (take) care of the trees. They are watering them.
28 ．Look! Joan (jog) along the river with her dog now!
29 ．—Where is Helen
—I’m not sure. Maybe she (have) her baseball lesson.
30 ．Some of my classmates (walk) to school now.
三、完成句子
31 ．They are playing badminton now. (对画线部分提问) are they now
32 ．李华一家人正在公园里野餐。
Li Hua’s family a picnic in the park.
33 ．他们正在整理房间。
They the room.
34 ．我正在为聚会购买一些水果。
I some fruits for the party.
35 ．他们正在安静地画画。
They are quietly .
36 ．He runs every morning. (句型转化)
now.
37 ．The girl is reading a book.（对划线部分提问）
is the girl
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38 ．我正在打包我的衣服准备旅行。
I my clothes for the trip.
39 ．一些孩子正在堆雪人，另一些孩子正在雪中玩耍。 Some kids snowmen. Others in the snow.
40 ．我正在听一首英文歌。
I am an English song.
题型一 语法填空
阅读下面短文，根据语境或所给单词的提示，在每个空格内填入恰当的词，要求所填的词意义准确、形式正确，使短文意思完整、行文连贯。
Trees are important to us. They do a lot for our environment (环境) and animals.
Trees help to keep the air clean and make us 1 (health). They take in dirty air and give clean air to us. Go for 2 walk in the park in the morning, and you can feel how nice it is to be with many trees and clean air.
Trees give people many kinds of beautiful flowers and delicious fruits 3 apples and oranges. Trees also give different animals and birds homes. They are even 4 (real) good places for animals to save food for winter months.
Trees are very 5 (help). People use them in many ways. They cut down (砍倒) trees to make paper, desks and chairs. They also use trees to build houses and shops. But 6 (use) is hurting (伤害). Cutting down too many trees is bad for nature. 7 of this, many animals lose (失去) their homes.
It is time for us 8 (stop) hurting our great friends—trees. Don’t use so much paper and take part in tree- planting 9 (activity). All of us should do something for 10 (we) dear friends!
语法填空
Trees are everywhere around us, but we often don’t care about them. These 1 (silence) friends are very important for all the living things on Earth. Forests are full 2 different animals, insects and plants. They are like homes for them.
Trees are like air cleaners in nature. They take in bad greenhouse gases, like carbon dioxide, and give out oxygen. So they help make the air 3 (clean) for everyone on the earth.
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Trees are important for nature, and they also make our 4 (day) lives better and 5 (convenient). Many things we use every day, like paper and pencils, and most of the furniture in our homes, come from trees. Also, trees give us lots of yummy fruits and nice drinks. For example, we can make tea with the 6 (leaf) of tea trees.
7 (sad), people are hurting trees. People 8 (cut) down a lot of trees around the world, and air and water pollution is making things worse for trees. These problems are really bad for 9 (we) environment.
It’s time for us to do something. We must work harder 10 (protect) trees. Trees are important for our lives now and the future of our planet.
题型二 阅读理解
Scientists have found that plants can make sounds.
A scientist named Lily Hadany and her team recorded (录制) tomato plants at different times. It showed that the plants made ultrasonic (超声波) sounds. Humans could only hear them with the help of a computer. They were noises like clicking (哒声) sounds.
As the scientists studied the sounds, they began to find some interesting facts. Plants made different sounds at different times. They hardly clicked when they had enough water, but as the earth got drier, they clicked more and more. Scientists also found that plants made sounds when they got hurt. When scientists cut off a leaf from the plants, the plants also clicked more. But the clicking wasn’t the same as that when the plants needed water.
Some scientists trained a computer AI system to identify (辨别) the different kinds of clicking sounds. It was able to find the difference between plants that needed water and plants with cuts. It means that one day we may be able to use these sounds to figure out when a plant is in a difficult time, and what problem it is having. That could be very helpful to farmers.
The team’s finding changes our ideas about plants. As Dr. Hadany says, “Even in a quiet field, there are sounds made by plants, and those sounds carry information and may help us a lot.”
1 ．If you want to hear the sounds of plants, which of the following may you need
A ． B．
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C ． D ．
2 ．How does the writer show the interesting facts in Paragraph 3
A ．By giving examples. B ．By telling stories.
C ．By asking questions. D ．By using numbers.
3 ．What does “figure out” mean in Paragraph 4
A ．Think about. B ．Put out. C ．Find out. D ．Care about.
4 ．What can people do with the help of the team’s finding
A ．Stop people from cutting down trees.
B ．Hear more beautiful sounds from different plants.
C ．Know how to identify different sounds faster.
D ．Help farmers to know more about their plants.
① Gardening (园艺) is popular in many parts of the world. It brings us beautiful flowers, fresh fruit and vegetables. But you can get more from your garden.
② Gardening helps to keep healthy. Today’s people sit indoors ( 室 内) for too long and don’t get much exercise. When you garden, you have to move a lot. It’s a good chance for you to exercise your body by watering flowers or doing some digging. And when you are in your garden, you can feel the warm sunshine. This means you are getting Vitamin D ．It helps your bodies use calcium (钙), and it keeps your bones (骨骼) strong.
③ ▲ It gets them off the computer, TV and phone. Gardening can be a great teacher to teach children about nature and healthy eating. It can also help them to understand the meaning of “No pains, no gains” .
④ Gardening is a great way to meet people and build friendship. When you are gardening, you are outdoors. So it is a perfect time to talk with your neighbors (邻居). Most people love to talk about their hobbies, and so do gardeners. They usually enjoy showing people what they are growing. And most enjoy sharing advice and stories about their gardens.
1 ．When it’s ________ you can get Vitamin D in your garden.
A ．sunny B ．cloudy C ．snowy D ．rainy
2 ．Which of the following can be the best for ▲ in Paragraph 3
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A ．Gardening will be good for your bones. B ．Gardening may help people to feel happy.
C ．Gardening is a great activity to do with children. D ．Gardening can be a good way to meet neighbors.
3 ．Which is the best title (题目) of the passage
A ．Keep Healthy B ．Enjoy Gardening C ．Outdoor Activities D ．Friendship with Neighbors
4 ．What is the structure (结构) of the passage
A ． B ． C ． D ．
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