高一英语下学期unit15-grammer_图文

Unit
?Grammer:Modal

15

Verbs (3) ?Key to some exercises

Modal Verbs (3): When you are very sure of something, you use must in positive sentences and cannot

or can’t in negative sentences.

e.g. You must be Jeanne. I’m Mathilde Loisel. We used to know each other very well. It can’t be true! I don’t believe it.
When you are quite sure about something, you use can. e.g. Attending a ball can be exciting.

When you think that something is possible, but you are not very sure, you use could, may or

might.(could,might here aren’t past form)

e.g.You could borrow some jewellery from your friend Jeanne, who is married to a rich man.

You may not know that the necklace I returned is not the one that I had borrowed. Don’t you have a friend who might lend you some jewellery?

Must , can/could, may/might 的用法

must
1.Must 表示推测时, 只能用于肯定句。 2.Must +be doing/do 表示对现在的动作进行肯定推测 3.Must +have done 表示对过去发生的事情作出的肯定 判断

Must , can/could, may/might 的用法

must
1.Must 表示推测时, 只能用于肯定句。 这台电脑肯定出了问题。 There must be something wrong with the computer. 你努力学了一整天, 一定累了吧. You have worked hard all day. You must be tired.

2.Must +be doing/do 表示对现在的动作进行肯定推测 他现在一定在看小说.
He must be reading novels now. 他们买了一套新房子。 他们一定很有钱.

They have bought a new house. They must have a lot of money.

3.Must +have done 表示对过去发生的事情作出的肯定 判断 他们在打篮球, 他们一定做完了作业。
They are playing basketball, they must have finished their homework. 路是湿的,昨天晚上一定下雨了。

The road is wet. It must have rained last night.

can/could
1. Can /could 表示推测时,只能用在否定句或疑问句 中。 这么晚了,汤姆还在看书吗? It’s so late. Can Tom be reading? 这个人不可能是玛丽, 她生病了。

It can’t be Mary. She has fallen ill.
她不可能在说谎。 She couldn’t be telling lies.

2. can/could have done 对过去发生行为的可能性进行 推测:

刚才我还看见他了, 所以他不可能出国的。
I saw him just now so he couldn’t have gone abroad. 门是锁着的, 所以她不可能在家。 The door was locked. She couldn’t have been at home.

3. Can/could have done “本可以,本来可能已经”用 于肯定句中,表示对过去发生的事情做出的判断, 你本来可以考的更好。 You could have had a better mark.

May/might
1.May/might表示推测时,只能用于陈述句,表示对现 在或将来要发生的动作把握不大。 她们明天可能会到这里来。

They may come here tomorrow.

他们可能还在等我们呢。 They may be still waiting for us. 2.might 可用于指过去的行为或者表示可能性更小。 他也许在作功课吧。 He might be doing his homework now. 我问他我是否可以离开。 I asked him if I might leave. I asked him “May I leave now?”

3.might/may have done,表示对过去发生的动作进行 可能性推测, 他可能去医务室了。 He may have gone to the clinic. 他可能已经从报纸上知道这个消息了。

He might have read about the news in the newspaper.

can/could
1. Can /could 表示推测时,只能用在否定句或疑问句 中。 2. can/could have done 对过去发生行为的可能性进行 推测:

3. Can/could have done “本可以,本来可能已经”用 于肯定句中,表示对过去发生的事情做出的判断,

May/might
1.May/might表示推测时,只能用于陈述句,表示对现 在或将来要发生的动作把握不大。
2.might 可用于指过去的行为或者表示可能性更小。

3.might/may have done,表示对过去发生的动作进行 可能性推测,

Key to some exercises:
Key to Page 85:

Pierre Loisel used to work___a in government office. One day he and his wife Mathilde received an to a ball ____ at the palace. Mathilde invitation_____ for a new dress but had no spent 400 franc____ more money___ for jewellery. She borrowed a from her friend Jeanne. The beautiful necklace_____ couple had a very good time at ___ the palace. But _____ after the ball Mathilde lost the necklace. They borrowed money to buy a new diamond necklace____ for Jeanne. A necklave that looked exactly the same as ___ Jeanne’s cost them 36,000 francs._____ After they returned the necklace, , they had to work day and night ____ten years to pay for when back the money they had borrowed._____ Mathilde met Jeanne again, she had changed so

that much______Jeanne could not recognise her. She did not know ______ until then that the necklace she of diamonds. It had borrowed was not made ____ had been worth 500 francs ____ at most.

1.I think the tiger must be in the box on the ______ right the princess doesn’t want the young because man marry the young woman left Or .. On the ___ because the princess wants to save the young man’s life. 2. I think the tiger can’t be in the box on the _____ left The princess doesn’t want the young because man to marry the young woman. Or … on the right _____ The princess doesn’t want the young because woman to die/be eaten by the tiger.

3. I think the princess may want to help the you man marry the beautiful young woman because She doesn’t want the young man to
die/be eaten by the tiger. 4. I think the princess may not want to see the yong man go into the box with the young woman in it because She does not want the man to marry the young woman.

; http://pg.euzw.net/ 作文批改网

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