新目标英语九年级Unit 8 It must belong to Carla. 情态动词复习讲解课件(共60张PPT)

(共60张PPT)
Learning goals:
复习部分情态动词的用法
1
2
情态动词的新用法—情态动词表示推测
3
对物品的归属进行猜测
思考？
你记得学过哪些主要的情态动词吗？
1
2
情态动词有哪些语法特征呢？
can. could, may, must，might, have to…
3
情态动词如何使用呢？
1. 情态动词有具体的词义。
2. 情态动词没有人称和数的变化。
3. 情态动词后必须跟动词原形，两者
一起构成谓语动词。
4. 一般疑问句提前边，
否定句在后直接加 not.
can / can not
1. 表示能力 (会)
1) Mary can speak English, but she can not speak French.
2) Can you lift this heavy box
3) Can you skate
2. 表示允许 (可以)
1）Can I use your dictionary
2）----- Can I go home now
----- Yes, you can. / No, you can’t.
1. 是can 的过去式； 表示过去的能力；
He could ride a bike at the age of five.
2. 用于婉转语气,多用于问句。“能，可以”
Could you please clean the room
---- Could I come to see you tomorrow
---- Yes, you can. ( No, you can’t. )
此处 could 不是过去式，只是语气更委婉，
答语中不能用could和 couldn’t，要用can 和 can’t。
could
may / may not
1. 表示请求和允许 (可以), 比can 正式.
May I come in
He may come if he likes.
may的用法:
may / may not
may的一般疑问句，其否定回答用 can’t 或 mustn’t。
1. --May I go home now
--Yes, you may. / Sure. / Yes, please.
No, you can’t./ mustn’t.
2. --May I use your washroom now
--No, you ______. There’s something wrong with the toilet.
A. needn’t B. mustn’t C. shouldn’t D. didn’t
B
must / must not
must 必须 ,表示说话人的
主观意志。
You must do your homework first.
must 的用法:
must / must not
mustn’t 表示禁止 ，不准，不允许。
You mustn’t smoke here.
You mustn’t play with fire.
must not的用法:
must / must not
以must开头的疑问句，
肯定回答：Yes , …must.
否定回答: No, … needn’t.
或 No, … don’t have to.
-- Must I clean the classroom now
-- Yes, you_______ .
-- No, you _________ . /
No, you ____________ .
must
needn’t
don’t have to
need作情态动词，主要用于疑问句和否定句中
need 一般疑问句:
肯定回答用 Yes, … must，
否定回答用 No,…needn’t .
或 No,…don’t have to.
如： Need I do it now
Yes, you ________。
No, you ___________ .
need 作行为动词，有人称、数和时态的
变化后接to do， 即 need to do sth.。
need
must
needn’t / don’t have to.
might / may
might 1. 是 may 的过去式。
2. 表示推测, 可能性较小。
1) He might be very busy now.
2) Your mother might know the truth.
may 也表示猜测，意为“可能”。
3) Where is my English book
It might / may be in your desk.
Ⅰ.用适当的情态动词填空：。
1. I can play football. __________you swim
2. I can’t play with you. I __________finish my homework first.
3. I__________ get up early tomorrow. because I have a meeting.
4. Nobody ___________live without air.
Can
must
must
can
5.__________I come in Yes ,please.
6. __________you please tell me where the
station is
7. Must I finish the work now
No, you _________.
8. --Need I take this book out
　 --Yes , you _____ .
　　A. can B. may C. need D. must
9. ______ the girl read before she went to school
A. Can B. Must C. Can D. Could
May
Could
needn’t
D
D
Whose dog is this
It might/ could be____.
He is a singer and actor,
he is known by everyone.
Whose dog is this
It must be Liu Dehua’s.
It might/ could be____.
He is a singer and actor,
he is known by everyone.
An actor, he is tall, cool and popular.
Whose dog is this
It might / could be___.
An actor, he is tall, cool and popular.
Whose dog is this
It might / could be___.
It must be Zhang Han’s.
He is a basketball player.
Whose car is this
It might / could be __.
He is a basketball player.
Whose car is this
It might / could be __.
It must be_________.
It can’t be _________.
mine
Yao Ming’s
He is rich but helpful.
Whose car is this
It might/ could be _____. It can’t be _______.
It must be_________.
He is rich but helpful.
Whose car is this
It might/ could be _____. It can’t be _______.
I must be ________.
mine
Bill Gates’
情态动词表推测讲解
must 表示推测
must 表示非常肯定的或有把握的推测， 意为“一定，必定”。
只用在肯定句中，不能用于否定句中。
Eg. You have worked hard all day.
You must be tired.　
might, could 表示推测
语气更委婉，表示的可能性较小，说话中留有余地，意为“可能，也许，或许”。
1. The football might / could be Jack’s.
He likes all kinds of ball games.
2. Liu Mei isn’t here today.
She might / could be ill.
can’t 意为“不可能”, 必用在否定句中。 Eg. -- The man can’t be Mr. Green.
-- He has gone to America.
情态动词表示推测
常考的有：
对某事判断的程度：
must ＞ could ＞ might ＞ can’t
must ,could, might, can’t
用must, could, can’t, might填空。
1. --Excuse me, whose book is this
-- It ______ be John’s. It has his name on it.
2.The man ________ be my English teacher. He has gone to Canada.
3. It __________ be Jim’s football. He likes playing football very much.
must
can’t
might /could
【例1】 -- Jim is reading a book under that tree.
-- It _____ be Jim. He has gone to Hainan.

A. may
B. mustn’t
C. can’t
D. could?
C
典型例题解析
【例2】 -- Where are you going this month
-- We _____ go to Xiamen, but we’re
not sure.

A. needn’t
B. must
C. might
D. mustn’t?
C
典型例题解析
【例3】— Where's Mr Li
I have something important to tell him.
— You ____ find him. He ______ Japan.
A. may not, has gone to
B. may not, has been to
C. can’t， has gone to
D. can't, has been to?
C
典型例题解析
【例4】 —Could I look at your pictures
—Yes, of course you _________.

A. could B. can
C. will D. might?
B
典型例题解析
【例5】—Where is Jack，please
—He______be in the classroom.［2013 杭州］
A. can B. need
C. would D. must?
D
典型例题解析
(可能是Mary。)
(不可能是Mary。)
Mum: Who is it
J: It must be Tom.
M: It might/could be Mary.
J: It can’t be Mary. She is in China.
(一定是Tom。)
(可能是Kate。)
(绝对不是Marry。)
Mum: Who is it
Jim: (一定是Tom。)
It must be Tom.
It might/ could be Kate.
It can’t be Marry.
She is in China.
-It______ belong to Mark or Lili
Because they both play football.
-Whose football is this
might
could
must
Lili
Mark
-It_______ belong to Bush.
Because___________________
Bush
-Whose red bicycle is this
can’t
his bike is white and blue.
Can this
T-shirt be
Jim’s
It can’t be Jim’s.
Because it’s too small for him.
Jim
Liu xiang
-It______ be Liu Xiang’s.
-Whose exercise book is this
must
It must belong to Liu Xiang
Because it has his name on it.
语言点：whose 谁的
1.Whose truck is that (同义句)
________ is that _______
2. I think that is my father’s shirt.
（就划线部分提问）
_______ shirt do you think _______ ____
3. By ______ the car was invented
Whose
that is
Whose
truck
whom
Whose … is this
It can’t be xx’s.
It must be xx’s.
It could /might be xx’s.
belong to xxx.
belong to xxx.
belong to xxx.
It is mine/yours/hers/his/ours...
= It belongs to me/you/her/him/us.
It’s Li Ping’s.
= It belongs to Li Ping.
belong to sb (名词/代词的宾格)
= be sb’s (名词所有格/ 名词性物主代词)
belong to 属于…
1. 不能用于进行时态
2. 不能用于被动语态
3. belong to +名词或代词的宾格。
4. 常与名词性物主代词或名词所有格进行
句型转换, 即：
belong to + sb. / 代词宾格 =
be + sb’s / 名词性物主代词。
1. Who is the owner of the black box (同义句转换)
________ does the black box _____ ____
2. Would you like to have a __________ (野餐) with us this weekend
课时训练
Who/Whom
belong to
picnic
3. This bike is Lucy’s. (同义句)
This bike ___________ Lucy.
4. It must be hers. (变否定句)
It _____ ___ hers.
5. --Whose storybook is this
-- It ____ Jack. I saw him reading just now.
A. must be B. must belong to
C. is D. be belong to
belongs to
can’t be
B
小结：情态动词归纳
can : 1. 表示能力，“能，会”
2. 表示允许，“可以”，
Can I… 较口语化。
3. 表示推测。
can’t 只用于否定句中。
could :
1. 是can 的过去式，表示过去的能力。
2. could表示更为委婉的语气。
3. 表示猜测，“很可能”
may:
1. 表示许可，“可以”。
2. 以may引导的一般疑问句的否定回答can’t / mustn’t 用。
3. 表示推测，用于肯定句中。
might :
1. 是may的过去式。
2. 表示猜测，可能性比could小。
must ：
1. 表示说话人的主观意志，“必须”。
　 2. mustn’t 表示“禁止，不允许”。
3. must引导的疑问句，否定回答用needn’t / don’t have to.
4.must 表示猜测，”一定“，只用于肯定句中。
need:
1. 作情态动词时，用于疑问句和否定句。
2. need引导的疑问句，
肯定回答用 must，
否定回答用needn’t/ don’t have to。
3. need作为行为动词，有人称和数的变化，后跟to do 。
情态动词表示推测的时态
对现在情况的推测 情态动词+ do
对正在发生的事情的推测 情态动词+ be doing
对过去或已完成事情的推测 情态动词+ have done
He must have a car now.
（现在）他一定有辆小汽车。 He must be doing his exercises in the classroom.
（正在进行）他一定在教室里做练习。 He must have finished the work.
（过去发生）他一定已完成了工作。
He may / might be sleeping now.
The boy may / might not be watching TV at home. 这个男孩可能没在家看电视
These students may / might have seen the film before.（过去） 这些学生以前可能看过这部电影。
1. It is eleven o’clock. They ______________
( have ) classes.
2. She is smiling. She _______________
(know) the good news.
must be having
must have known
翻译:
1. I must be dreaming.
2. He might be running to catch a bus.
3. He could be running for exercise.
4. They must be making a movie.
5. Many people are wearing coats.
The weather ______ be cold outside.
6. I can’t find my bag. I think somebody must have picked it up.
Thank you!