初中英语情态动词的基本用法讲解

初中英语情态动词的基本用法讲解

1.can

1）表示能力，能够，会

Two eyes can see more than one. 两只眼比一只眼看得清。

I can swim我会游泳

2）表示可能Jim went to Beijing ,so he can’t be at home.

He can’t have enough money for a new car. 他不可能有足够的钱买新车。

3）表示允许。可以

Can I have a look at your new pen? 我可以看一看你的新钢笔吗？

回答：Yes ,of course/Yes you can. No,you can’t

4）比较委婉客气地提出问题或陈述看法。

Can you lend me a hand? 帮我一把好吗？

2.Could

1.can 的过去式，能，会

I ______swim when I was three years old.

2.情态动词，--可以比can 客气，委婉

Could you help me?----Yes,of course/sorry,I can’t.I am busy.

3. May

1）表允许，可以，比can ,could 更客气委婉

You may take whatever you like. 你喜欢什么就拿什么。

He told me that I might smoke in the room. 他告诉我可以在房间里抽烟。

May (Might) I ask for a photo of your baby? 我可以要一张你宝宝的照片吗？

在回答以may引起的问句时，多避免用这个词，而用其它方式，如Yes, please. / Certainly. / Please don’t ./ You’d better not. / No, you mustn’t.等，以免显得太严峻或不客气。

2）表可能（事实上）。可以指过去时间，也可以指现在时间，但语气更加不肯定。

He may be at home. 他可能在家。

She may not know about it. 她可能不知道这件事。

They might be having a meeting, but I’m not sure. 他们有可能在开会，不过我不肯定。3. must

1）表示义务。意为“必须”（主观意志）。Mustn’t 不准

We must do everything step by step. 我们一切都必须循序渐进地做。

You mustn’t talk to her like that. 你不可能那样对她说话。

--Must we hand in our exercise—books now? 我们现在就要交练习本吗？

--No, you needn’t. / No, you don’t have to. 不必。（这种情况下，一般不用mustn’t）

2）表示揣测。意为“想必、准是、一定”等，只用于肯定句。

He must be ill. He looks so pale. 他准是病了。他的脸色苍白。

She’s wearing a diamond necklace. She must have a lot of money.她戴着钻石项链，一定很有钱。

1. -Mum，may I watch TV now？-Sure，but you ________ help me with my English.

A. can

B. may

C. must

D. could

2. -________ I download the article again？-No，you needn't.

A. Shall

B. Will

C. Must

D. Can

3. -Can you go skating with us this afternoon？

-Sorry，I can't. I ________ take care of my little sister at home.

A. can

B. may

C. would

D. have to

4. -Must I hand in my exercise book today？-No，you ________.

A. can't

B. needn't

C. mustn't

D. won't

5. -May I have a word with you？-No，you ________. I'm busy today.

A. needn't

B. wouldn't

C. don't have to

D. can't

6. -________I have your English name，please？-Yes，Helen. H-E-L-E-N.

A. Must

B. May

C. Will

D. Need

7. -Who is the boy over there？Is it John？-No，it ________ be him. John is much taller.

A. mustn't

B. may not

C. can't

D. needn't

8. -Can you play Frisbee，Jay？-Yes，I ________. It's easy.

A. must

B. can

C. need

D. may

9.-You must come back every month. -Yes，I ________.

A. will

B. must

C. should

D. can

10. She ________ know the answer，but I'm not sure.

A. maybe

B. may be

C. may

D. must

11. - Must we clean the room right now？- No，you____. You _____clean it after lunch.

A. needn't；may

B. needn't;must

C. Mustn't；can

D. mustn't；may

12. John________ come to see us tonight，but he isn't very sure yet.

A. may

B. can

C. has to

D. must

13. Children ________ play with fire.

A. mustn't

B. can't

C. shouldn't

D. needn't

14. -________ I come in，Mr Green？-Yes,come in，please.

A. Must

B. Need

C. Will

D. May

15. -Must I finish the work today？-No，you ________. You ________ finish it tomorrow.

A. mustn't；may

B. can't；can

C. needn't；may

D. needn't；must

1 ( ) 1 John___ come to see us tonight, but he isn't very sure yet.

A. may

B. can

C. has to

D. must

( ) 2 They ___ do well in the exam.

A. can be able to

B. be able to

C. can able to

D. are able to

( ) 3 -May I take this book out? -No, you___.

A. can't

B. may not

C. needn't

D. aren't

( ) 4 You___ go and see a doctor at once because you're got a fever.

A. can

B. must

C. dare

D. would

( ) 5 -Can you speak Japanese? -No, I____.

A. mustn't

B. can't

C. needn't

D. may not

2( ) 1 -He___ be in the classroom, I think.

-No, he ___ be in the classroom. I saw him go home a minute ago.

A. can; may not

B. must; may not

C. may; can't

D. may; mustn't

( ) 2 -Shall I get one more cake for you, Dad?-Thanks, but you___, I've had enough.