(共58张PPT)
Animals are man’s friends.
What’s this And how to describe it
elephants: enormous, gray
Let’s describe some of the animals.
What’s this And how to describe it
monkey: noisy, clever
What’s this And how to describe it
kangaroo: playful
What’s this And how to describe it
manatee: gentle, shy
What’s this And how to describe it
cheetah: aggressive, spotted, fast playful
chimpanzee: noisy, playful, furry
What’s this And how to describe it
tiger: aggressive
What’s this And how to describe it
panda: gentle, furry, white and black
What’s this And how to describe it
What’s this How to describe it
polar bear: aggressive, funny
1b Listening and circle the words in 1a that Victor and Ginny use to describe the animals.
Tapescript
Victor: Hey, Ginny. What’s that big,
furry animal on the pond
Ginny: It’s a polar bear, Victor. They’re
kind of aggressive.
Victor: Are they Looks like they really
love water.
Ginny: Uh-huh.
Victor: And what do you call those big,
gray things in the water
Ginny: They’re called manatees.
Victor: What
Ginny: Manatees. They’re very gentle
and very shy.
Victor: Oh. And how about the yellow
and black spotted animals in
that cage
Ginny: They’re cheetahs. The cheetah is
the fastest animal on earth.
I am like this animal because I am strong and intelligent. I like water and I like to eat vegetables.
You’re like an elephant.
No.
You’re like a manatee.
Yes.
1.endangered
2.mangroves swamps
3.habitat
4.aquatic feed a. the place where something lives
b. there aren’t very many of them
c. underwater plants and vegetation
d. a place where trees grow in water
2a. Listen and match the words with definitions.
Kind of animal
Numbers
Habitat
Reason why they
are endangered
Description
manatee
2,500 in the US
water under trees in
mangrove swamps
swamps polluted, not
enough food
large, three meters long,
weighs 1,000 pounds
2b Listen again. Complete the chart.
Tapescript
Boy: Can you tell us about the manatees, please
Man: Sure. We’re trying to save them.
Boy: Why Are they endangered
Man: Yes There used to be a lot of manatees, but now there aren’t very many there are
Boy: Do you know how many there are
Man: At this point, there are only about 2,500 in the U.S In 1972, it was discovered that they were endangered. Since then, the government has passed laws to protect them.
Boy: Where do they live
Man: Their favorite habitat is the water under the trees in mangrove swamps.
Boy: And why are they endangered
Man: Some of the swamps have become polluted. Also, there sometimes isn’t enough food for all of them. As you can see, they’re large. The average manatee is
about ten feet long and. The average
manatee is about ten feet long and
weighs about 1,000 pounds. They need
about 100 pounds of aquatic feed a
day.
Boy: Aquatic feed
Man: Oh, that’s underwater plants and vegetation. That’s what they eat.
Explanation
1.I am like this animal because I am
strong and intelligent.
be like=look like=be similar to
像，看起来像。如：
He is like his father. 他像他的父亲。
= He looks like his father.
= He is similar to his father.
这里的like作介词，意思为“像”，like 还可做动词用，表示“喜欢”，like（doing）sth. 喜欢做某事。如：
He likes his father very much.
他很喜欢他的父亲。
Mary likes playing volleyball.
玛丽喜欢打排球。
2.How big are manatees 海牛有多大？
how big... 询问体重。以how组合的疑问词组有很多，如：
how old 询问年龄 how often询问频率
how long询问动作持续的长短
how much询问质量或者价钱
how far 询问距离 how many询问数量
how soon 询问过多久
3….they weigh about 1,000 pounds,
……他们大约重1000磅。
weigh 称……重量，测……重量。如：
He weighed the stone in his hand.
他用手掂了掂这块石头的重量。
The piece of meat weighs four pounds.
这块肉重四磅。
weight 还可用做名词，重量。如：
What is your weight？
你的体重是多少？
4. We’re trying to save the manatees.
我们正在竭尽全力拯救海牛。
Try to do =try one’s best to do
努力去做某事。如：
Every student should try to study hard in
order to study in a university.
为了进入大学学习, 每个学生都应该
努力学习。
A: How big are
manatees
B: They’re about 10
feet long and they
weigh about 1,000
pounds.
Grammar Focus
时 态 谓语动词的形式 （do）
一般现在时
一般过去时
现在进行时
现在完成时
一般过去时被动语态
现在完成时被动语态
do / does
did
be (am / is / are) doing
have / has done
was / were done
have / has been done
【定义】现在完成时表示到目前为止已经完成，并对现在留下某种后果和影响的动作。
1. 表示过去发生的某一动作对现在造成的影响或结果,常与一些时间状语。
现在完成时
have / has + 动词的过去分词
如: already, yet, ever, never, just, before, once, twice 等连用, 也可以和包括现在在内的时间状语, 如these days, today, this year, so far 等连用。
2. 表示过去发生的动作或存在的状态,一直持续到现在,也许还将继续下去,可以和表示从过去某一时刻延续到现在的一段时间的状语连用。
即for +时间段, since+时间点/从句, in the last ten years等, 谓语只可用延续性动词。
2. has / have been to
去过某地表示某人的一种经历,可与once, twice, already, ever, never等连用。
have/has gone to
去某地了,说话时某人已离开此地,在去某地的途中或已在某地。
have / has been in
逗留在某地 (已经一段时间)。 常和for ten days, since I came here等连用。
1. Where is Jim He ___________ Wuhan.
2. My parents ___________ the Great Wall twice. They like there very much.
3. _____ you ever _______ to the Happy valley
4. How long ____ Peter _______ the West Hill farm
have been to
Have
been to
has
been in
has gone to
5. My sister __________ the shop. She will be back in two hours.
6. She ___________ Shanghai. She isn’t here.
7. She __________ Shanghai. She is here.
8. She __________ Shanghai for two years.
has gone to
has gone to
has been to
has been in
3. already ---------- yet 已经
用于肯定句
用于否定句, 疑问句
1. She has not seen this film _____.
She has _______ seen this film.
2. I have ______ combed my hair.
Have you combed your hair ____.
3. He has _______ watched a video.
He has not watched a video _____.
already
already
already
yet
yet
yet
4. 现在完成时中延续性动词和终止性动词
英语动词根据词义可分为两种,一种是延续性的,一种是终止性的,终止性动词(也可称为非延续性动词,瞬间动词,或点动词),如:become, begin, buy, borrow, arrive, die, finish, get to know, go, join, marry, start, stop等。表示动作的发生
与结束于一瞬间完成,不能再延续,
所以它的现在完成时不能和表示延续的时间状语连用,即不能与表示一段时间的状语, for+时间段, since+时间点/从句连用,也不能用在how long引导的特殊疑问句。
初中英语课本中常见终止性动词有: leave, go, come, arrive, begin, buy, borrow, die, join, become 等。
终止性动词要表示持续时, 可用以下方法：
⑴ 将时间状语改为时间段 + ago, 句中谓语动词用一般过去时。
eg. 我弟弟参军两年了。
My brother joined the army two
years ago.
⑵ 若保留for + 时间段, since+时间点/从句, 或用在 how long句型中, 则需将终止性动词改为相应的状态动词或延续性动词。
come / go / arrive / get / reach / move
--- be in/at
open --- be open die --- be dead
close --- be closed become ---be
borrow --- keep put on --- wear
buy --- have
常见终止性动词与延续性动词 (或状态动词) 的对应关系如下:
leave ----- be away (from)
begin / start ----- be on
fall asleep ---- be asleep
end/finish ----- be over
catch a cold ----- have a cold
join the army
---- be in the army be a soldier
join the Party
---- be in the Party be a Party member
1. 吉姆买了这只钢笔两年了。
Jim has had this pen for two years.
Jim has had this pen since two years
ago.
Jim has had this pen since 2003.
It is two years since Jim bought this
pen.
It has been two years since Jim
bought this pen.
Jim bought this pen two years ago.
2. 李雷自从2003年就参军。
3. 那部电影开始30分钟了。
4. 自从两年前这家商店就开了。
5. 那个老人已经死了五年了。
6. 莉莉六年前就离开家了。
现在完成时和一般过去时的区别：
现在完成时所表明的是过去发生的动作
现在的影响, 强调的是现在的情况, 不可以
和表示过去的时间状语 yesterday, in
1991, three days ago last time, last
night等连用。
一般过去时表明的是过去发生的事实, 和
现在不发生关系。
5. 现在完成时中的 for 与 since for + 时间段与延续性动词的现在完成时连用 since + 时间点/从句。
I have kept the library book for a week. = I have kept the library book since a week ago.
It is /has been + 一段时间 + since...
自从某事发生已有一段时间了。
It is /has been two years since
my brother joined the army.
【注意】
1. since 引导的从句中动词用过去时。
2. when 引导 的特殊问句不与现在完成时连用。
3. have got,has got 虽然是现在完成时,但 have got = have has got = has
1. It's a long time since we ______
(meet) last time, isn't it
2. --I know you __________ (choose) a picture book among these.
--Yes,Have a look at it, please.
3. So far, spaceships without people __________ (reach) the moon and some other parts of the universe.
met
have chosen
have reached
4. My father ____ home for nearly three weeks. A. has gone away from
B. has left C. has been away from
D. went away
5. Mr and Mrs Green have ____ in China for a week. A. been B. got
C. arrived D. reached
近义句转换：
1. Jack joined the League five months ago.
Jack _________ a League member five months ago.
2. It’s a long time since we met last.
We ________ _____ each other for a long time since we met last time.
has been
haven’t
seen
Fill in the blanks with the right forms of the given words.
1. Every day my mother _____(get) up early.
2. The dinosaur eggs _______________ (discover) many years ago by scientists.
3. Listen! Some children ___________ (sing) an English song over there.
gets
were discovered
are singing
4. In our hometown there used to ___(be) many old trees.
5. My work __________________ (not finish) yet. I can’t go out to play with you.
be
hasn’t been finished
