概要信息：

情态动词三特点：
⑴它们必须与其他动词连用，即：情态动词＋动词原形
⑵没有人称和数的变化，即第三人称单数不加-s
⑶情态动词具有“多义性”。
Unit9-10 强化与精练1
【福建莆田】
(       ) 31. —Do you know this song?
—Yes, and I _________sing it well.
A. must B. can C. need
⑴表示体力或智力上的能力，即“能够，会”
I can use the computer now, but I ______不能 two years ago
可与be able to转换。
He can speak English now
He couldn’t speak English when he was 5
Can的基本用法
can/be able to
We shall _____ finish the work next week
I haven't _____ find any jobs.
1. Goerge had travelled a lot. He ____ speak 4 languages.
2.I haven’t ____ sleep very well recently.
3.I can’t understand Martin. I’ve never ____ understand him.
4.I used to ____ stand on my head but I can’t do it now.
5.Ask Catherine about your problem. She might ____ to help you.
⑵
例：
—Can we go home now, please?
— No, you can’t.
You can only smoke in this room.
You can’t keep the library books for more than a month
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请求对方(can you)还是允许自己 (can I )
1. You are carrying a lot of things. You can’t open the door yourself. 
There is a man standing near the door.
You say to him:
____________________________________.
2. You want to borrow your friend’s camera. What do you say to him?
You: _________________________________.
3.You phone Ann but somebody else answers. Ann isn’t there. You want 
to leave a message for her.
You: _________________________________.
4. You are at a friend’s house and you want to use her phone. What do 
you say?
You: _________________________________.
5. You are a tourist. You want to go to the station but you don’t know 
where it is. You ask at your hotel.
You: _________________________________.
6. The woman in the next room is playing music. It’s very loud. You want 
her to turn it down. What do you say to her.
You: _________________________________.
A:What shall we do this evening?
B: we can go to the cinema
Could I borrow some money from you?
When you go to New York next month, you could stay with Barbara
Where shall we go for our holidays?
______________________________(法国)
What shall we have for dinner tonight 
______________________________(吃鱼)
What shall I give Ann for her birthday? 
_______________________________ (书)
When shall I phone Diana 
________________________________(现在)
Mum, _____I go out now?
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May:
表示“许可”
例：
You may come if you wish.
You may not pick flowers in this park. 
May的基本用法
Can I come in?     Yes
Could I come in?  Yes
May  I come in?   Yes
Might I come in?  Yes
例：I must go now, or I’ll be late.
You must be here before ten o’clock.
肯定句：必须
35.—Look at the sign! 
—Oh, I see.We _______ waste water. (广西南宁市)
A. can           B. must             C. mustn’t          D. needn’t
否定句：严禁
Children ______ play on the road or in the street. It is dangerous.
A. may not B. mustn’t C. couldn’t D. needn’t
疑问句：？
Must的基本用
Why must you always be finding fault with me?
If you must smoke, at least you could use an ashtray(烟灰缸).
John，look at the time. you play the piano at such a late 
hour?
A.Must B.Can C.May D.Need
— May I smoke here?
— If you ，choose a seat in the smoking section.
A.should B.could C.may D.must
must/have to
In China many children ____ wear uniform when they go to school.
When you come to London again, you ____ come and see us.
Last night Don became ill suddenly. We ____ call a doctor.
I’m afraid I can’t come tomorrow. I ____ work late.
I’m sorry I couldn’t come yesterday. I ____ work late.
My sister may ___ go away next week.
Julia wears glasses. She ________ wear glasses since she was very young.
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mustn’t/don’t have to do 
I don’t want anyone to know. You ____ tell anyone.
He _______ wear a suit to work but he usually does.
I can stay in bed tomorrow morning because I _______ go to work.
Whatever you do, you _______ touch the switch. It’s very dangerous.
There is a lift in the building, so we _______ climb the stairs.
You _______ forget what I told you. It’s very important.
Don’t make so much noise. We _______ wake the baby.
You _______ be a good player to enjoy a game of tennis.
need的基本词义是“需要”
I don’t believe you need worry. 我相信你没有必要焦急。
Need we go so soon? 我们需要这么早就去吗？
Need的基本用法
need的基本词义是“需要”，它既可作情态动词，又可作实义动词
情态动词(can)
1)肯定
2)疑问
3)否定
实义动词(want)
1)肯定
2)疑问
3)否定
He _____ before the class begins
A. need come
B. needs come
C. need to come
D. needs to come
I want to go to the dentist’s. but you _____with me. 
A.need not to go 
B.do not need go 
C.need not go 
D.need go not 
• Can
• May 
• Must 
• Need
情态动词问答背诵：
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【广东深圳】
8.   — Must I return the book this week? 
— No, you ____. You can _ it for 20 days.
A. mustn't: keep                    B. needn't; borrow 
C. needn't; keep                    D. mustn't; borrow
【福州中考】
— Mom, must I finish my homework now?
— No, you ______. You may have supper first.
A. mustn’t B. needn’t C. can’t
(重庆市) 
–Can you play the piano?
-Yes, I _______. I often practice it on weekends.
A. needn’t       B. need            C. can’t             D. can 
(武汉中考)
-May I watch TV for a while？
-No, you _______. You have to finish your homework first. 
A. shouldn’t     B. needn’t          C. mustn’t          D. won’t
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