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情态动词
一、情态动词的定义:情态动词有词义,但它不能单独作谓语,它必须和其他动词一起构成谓语。情态动词没有人称和数的变化;它的后面必须跟动词原形。
二、小学阶段常见的情态动词:
情态动词
词义
否定形式
词义
can
能够,会
can’t
不能,不会
could
能够,会
couldn’t
不能,不会
may
可以
/
/
must
必须
mustn’t
不允许,不能
shall
将,要
/
/
should
应该
shouldn’t
不应该
will
将会
won’t
不会
would
将会,愿
wouldn’t
不会,不愿
三.用法特点
⑴ 它们必须与其他动词连用,
即:肯定:情态动词+动词原形:He can swim.
否定:情态动词+not+动词原形:He can not(can’t)swim.
一般疑问句:把情态动词提前:Can he swim?Yes,he can./No,he can’t.
表示说话人对所述动作的看法,如需要、可能、意愿或怀疑等。
⑵情态动词没有人称和数的变化,即第三人称单数不加-s,有些情态动词有时态的变化
⑶ 在意义上,情态动词具有“多义性”。
例:can既可表示能力,又可表示可能、允许等意义。
四、情态动词的用法及主要句型:
1、Can I help you? ——Yes, please. / No, thanks.
2、Can + 主语 + 动词原形? Yes, ~ can. No, ~ can’t.
3、Can I borrow(借用) your book?----Yes,of course.
4、Can I write on the book? ------No, you can’t\mustn’t.
5、Could \Can you help me?---- Yes,of course.\Certainly.\ Sure.
6、Could \Can you tell me the way to the zoo?
7、May I come in ?----- Come in, please.
8、May I sit here?----- Yes, please.\Sorry, please don’t.
9、May I have some Coke?---- Yes, of course.
10、May/ Could / Can I speak to Tom? -----Speaking. Who’s calling?
11、should 、shouldn’t 表示劝告:
1) He should get up early.
2) She shouldn’t play computer game too much.
12、Should +主语 +动词原形? Yes, ~ should.\ No, ~ shouldn’t.
13、表示建议“你愿意…吗”
Would you like to go shopping with me?
-----Yes, I’d love to. /I’d love to. But I’m busy now.
14、就餐用语Would you like something to eat\drink? ----Yes, I’d like…
15、shall用于第一人称(I, we), 可以表示“将”和表示建议 “……好吗?”
1) Where shall we have dinner?
2) Shall we go fishing? -----All right. \OK. \Good idea.
16、Must + 主语 + 动词原形? ---Yes,~ must.\No, ~ needn’t.
情态动词练习
一.按照要求改写句子
1. I can run fast.
I ________ ________ fast. (否定句)
2. You must return the book now.(一般疑问句)
________ I return the book now? No, you ________.
3. He can play basketball well. (一般疑问句)
_______ he ______ basketball well?
4. They must take the books out of the room. (否定句)
They ________ ________ the books out of the room.
5. He should get up early. (否定句)
He _______ get up late.
6. Daniel must watch TV every evening.(改为否定句)
___________________________________________________
7. I can’t do my homework every day.(改为肯定句)
________________________________________________________
8. You’ll need your book and pen..(改为否定句)
_______________________________________________________
9.We shall like playing computer games.(翻译句子)
________________________________________________________
10. She should go to school every morning.(改为否定句)
_______________________________________________________
11. He can speak English very well.(翻译句子)
__________________________________________________________
12. Would you like to drink coffee?(肯定回答)
________________________________________________________
13. She can walk quickly. (否定句)
14. They can paint the wall well. (一般疑问句)________________________________________________________
15. Tom must carry the box into the room. (否定句)
________________________________________________________
16. She should reach the station early. (否定句)
________________________________________________________
二. 单项选择。
( )1. you like some milk ? A . Would B. Could C . Can
( )2. We pick the flower in the park. A. can’t B. don't C. mustn’t
( ) 3.We should more trees, and we shouldn’t cut any trees.
A. plant B. planting C. plants
( ) 4.May I have some coffee?
A.Yes,you have. B. Yes,you can. C. Yes,certainly.
( ) 5.Shall we visit the factory?
A.Yes,we do. B.Yes, we shall. B.All right.
( ) 6.Would you like something to eat?
A.Yes,we would. B.Yes, I’d like some cakes. C.Yes, of course.
( ) 7.What can I do for you?
A.Yes,you can. B.No,I can do it. C. Yes.I’d like some oranges.
( )8. you like some bread ?
A . Would B. Could C . Can
( )9. We throw the waste in the zoo.
A. aren’t` B. don't C. mustn’t
A.Yes,you have. B. Yes,you can. C. Yes,certainly.
( ) 11.Would you like some tea?
A.Yes,thank you.. B.Yes, please. B. No, here you are..
( ) 12.Can I help you?
A.Yes,you can. B.No,I can do it. C.Yes.I’d like some oranges.
( ) 13. May I your eraser ?
A use B has C using
( ) 14. Can she high?
A jumps B jumping C jump
( ) 15. What should Amy for her mum?
A buys B buying C buy
( ) 16. They may in the libtary.
A read B reading C reads
( ) 17. I would like shopping with you.
A going B to go C go
( ) 18. What will Zhou Lin ?
A do B doing C does
( ) 20. They must .
A friendly B are friendly C be friendly
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