(共21张PPT)
Unit 8 Have you read Treasure Island yet
Section A Grammar Focus-4c
优质课件
一、教学目标
1.To review past participle.
(复习过去分词知识)
2.Ss can master the Present Perfect tense.
(学生能掌握现在完成时态)
二、教学重点及难点
1.To review past participle.
(复习过去分词知识)
2.Ss can master the Present Perfect tense.
(学生能掌握现在完成时态)
Enjoy the following song to finish these sentences
We have_______each other since we were nine or ten.
We have _______hills and trees.
known
climbed
现在完成时
I cleaned the rooms.
The rooms are all clean now.
now
past
1.用法:现在完成时表示____发生的事情对____造成的影响或结果。
常与标志词just刚刚,already已经(肯定句),yet还，仍然（否定
句）,ever曾经,never从未,before以前,so far到目前为止等连用。
过去
现在
I have cleaned all the rooms.
(房间是过去扫的，现在结果是干净的)
2.现在完成时构成：have/has+动词的过去分词
Have you read Little Woman yet 你读过小妇人吗？ Yes, I have. / No, I haven’t.
Has Tina read Treasure Island yet Tina读过金银岛吗？ Yes, she has. She thinks it’s fantastic.是的，读过，她认为极其了不起。
Have you decided which book to write about yet 你决定写哪本书了吗？ Yes, I have. I’ve already finished reading it. It was really good.
是的，我已经读完了。
找出现在完成时的结构，并圈出动词的过去分词形式。
(______) read--_______--________.
阅读
read
read
(______) decide--_________--________.
决定
decided
decided
(______) finish--_________--________.
完成
finished
finished
变化规则是什么？
3.动词过去分词形式的变化规则
动词过去分词的规则变化：________________________
stay → _______ → _______
work → _______ → _______
taste → _______ → _______
like → _______ → _______
study → _______ → _______
copy → _______ → _______
stop → _______ → _______
plan → _______ → _______
stayed
stayed
worked
worked
tasted
tasted
liked
liked
studied
studied
copied
copied
stopped
stopped
1.与该动词的过去式相同
一般情况下直接 + ed
以不发音e结尾的直接+ d
planned
planned
以辅音字母+y结尾的，把y变i 再 + ed
以重读闭音节“辅元辅”结构结尾的， 双写尾字母，再+ed
动词过去分词形式的不规则变化
let → _______ → _______
cut → _______ → _______
read → _______ → _______
feel → _______ → _______
keep → _______ → _______
sleep → _______ → _______
let
let
cut
cut
read
read
felt
felt
kept
kept
slept
slept
以不变应万变.
动词中间有俩e，
去掉一个（ e ），后加t
动词过去分词形式的不规则变化
lend → _______ → _______
build → _______ → _______
send → _______ → _______
buy → _______ → _______
bring → _______ → _______
catch → _______ → _______
teach → _______ → _______
see → _______ → _______
lent
lent
built
built
动词字母d变t.
变为以-ought或-aught结尾.
bought
bought
brought
brought
sent
sent
caught
caught
taught
taught
saw
seen
总结：动词过去分词的规则变化
1.与该动词的过去式相同
2.不规则情况：以不变应万变.
动词中间有俩e，去掉一个（ e ），后加t
动词字母d变t.
变为以-ought或-aught结尾.
4.现在完成时的基本结构
I
have finished
my homework.
I
have cleaned
the rooms.
I
have made
some delicious food.
肯定句：主语+ have/has+过去分词 +其它
He
not
has
They
have
cleaned
the rooms.
5.现在完成时的句型转换
思考
否定句在_____________后面加not。
not
finished
his homework.
have或has
have not = haven’t has not = hasn’t
现在完成时的句型转换
They
have
cleaned
the rooms .
He
has
finished
his homework .
Have
they
Has
he
思考
一般疑问句把______________提至主语前,
回答时，要使用_______________.
have或has
主语+have或has
—Yes, they have.
No, they haven’t.
—Yes, he has.
—No, he hasn’t.
exercise
(1)The documentary is so impressive that I___it several times so far.
A.watched B.watch C. have watched D.will watch
(2)I joined the book club last month and I____five books already.
A. am reading B. have read C. will read D.read
(3)Mr.Smith____Chinese for two years.He's much better at it now.
A.learns B. was learning C. has learned D. will learn
(4)Over the past few months,Chinese COVID vaccines (疫苗)___in
many other countries.
A. have arrived B. arrived C. will arrive D. had arrived
(5)-Let's go for a walk.
-But I____my work yet
A. don't finish B. won't finish C. didn't finish D. haven't finished
二、用括号中所给单词的适当形式填空。
1.She __________(not read) the book yet.
2.________ you ________(decide) which book to buy yet
3.Tom won't go to the cinema with us because he ________ already ________ (see) the film.
4.David hasn't ________(finish) ________(read) Harry Potter yet.
5.We ________ just ________(clean) the classroom.
6.I ________(lend) my bike to her yesterday, but she ____________ (not give) it back to me yet.
hasn't read
Have
has
seen
finished
have
cleaned
decided
reading
lent
hasn't given
三、按要求改写句子，每空一词。
1.She has already written the music. (改为一般疑问句)
________ she written the music _______
2.They studied English 2 years ago. (用 since two years ago 改写)
They ______ ________ English since two years ago.
3.Has Tom helped his parents yet (作出肯定回答)
_______, _____ _______.
4.The three students have been together for 3 hours. (对画线部分提问)
__________ __________ have the three students been together
5.She has already gone to England. (改为否定句)
She _____________ gone to England _____________.
6.He hasn't come to school because he's ill. (对画线部分提问)
_____________ _____________ he come to school
Has
yet
have studied
Yes he has
How long
hasn't
Why hasn't
yet
现在完成时 一般过去时
用法
时间 状语
谓语 动词
表示过去发生的动作对现在造成的影响，侧重于现在的情况。
表示过去某个时候发生的动作或存在的状态，与现在无关。
常和already, yet, just, ever, never, before, since, for等连用。
常和 yesterday, last week, just now, in 2012, two days ago等具体的表示过去的时间状语连用。
与一段时间连用时，谓语动词要用延续性动词而不用非延续性动词。
谓语动词没有延续性或非延续性动词的限制。
1. —When ______ Tom ______ (leave) his office
—He ______ about five minutes ago.
2. I ______ the book club last week and I ______ two books already.
A. join; read B. joined; read
C. joined; have read D. joined; has read
did leave
left
小试牛刀
1. A: Would you like something to drink
B: No, thanks. _______________________ (just/drink some tea)
2. A: I heard you lost your key. __________________ (find)
B: No, not yet.
3. A: Do you know when Tom is leaving
B:___________________ . (already/leave)
4a. Use the words in brackets to complete the conversations.
I’ve just drunk some tea
Have you found it
He has already left
A: When _________________ (leave)
B: This morning.
4. A: Is your sister going to the movies with us tonight
B: No. _________________________ . (already/see the film)
5. A: What do your parents think about our plan
B: I ____________________. (not/tell them/yet)
did he leave
She has already seen the film
have not told them yet
Fill in the blanks with the correct forms of the words in brackets.
4b
Sally _____ (love) reading. In the morning, she reads the newspaper and in the evening she reads books. She ______ already _____ (read) more than 100 different books! Her favorite kind of books is science fiction. She is interested in science and technology and loves to imagine what the world ______ (be) like in 50 years.
She _______ (finish) reading a book about robots last week and _________ (write) a book report about it next week for her French class. Every time she is in the library, Sally looks at the many books she __________ (not read) yet and she can’t wait to read them!
loves
has
read
will be
finished
will write
hasn’t read
过去动作对现在的影响
标志词
含义
构成
1.肯定句：have/has+过去分词
2. 否定句：haven’t/hasn’t+过分
3.一般疑问句have/has +主语+过分
(现在完成时)
区别一般现在时
already
yet
What have you learnt in this class
（这节课上你学到了什么？）
Thank you for lstening!
