高中英语必修三教学课件：Unit+1+情态动词

高中英语必修三

考点一 情态动词（ unit 1 ，unit 2）

一、情态动词的特点:

1.没有人称和数的变化。

2. 有些情态动词有过去式的变化:

e.g. will → would , can → could , may→ might , dare → dared

二、情态动词的否定式:

情态动词+ not +动词原形can not: can't , must not: mustn't , need not : needn't

三、情态动词的用法及相互区别, 是考试的内容之一

1. can , be able to be able to 表示经过努力后, 能够做到; be able to 有多种形式的变

化。

can

1). 表示体力或脑力方面的能力;

2). 表示允许、可能性。

could 是can的过去式, 表示过去有能力及过去存在的可能性 ; 用于疑问句表示委婉地

提出问题。

1) The fire spread through the hotel very quickly but everyone ____ get out. (NMET 97 )

A. had to B. would C. could D. was able to

2) -Will you stay for lunch?

-Sorry, __. My brother is coming to see me. (NMET99)

A. I mustn't B. I can't C. I needn't D. I won't

2.may 表示询问或说明一件事可不可做; 表示某事有可能发生。might是may的过去

式; 用在疑问中比may委婉、客气。

1) -May I take this book out of the reading-room?

-No, you mustn't. ( Yes, you may.)

2) -Might I make a suggestion? -Yes, you may.

2019年英语新同步浙江专用必修三讲义：Unit 1 Section Ⅲ Grammar—情态动词（Ⅰ） Word版含答案

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2019年英语新同步浙江专用必修三讲义：Unit

1 Section Ⅲ Grammar—情态动词（Ⅰ）

Word版含答案(可编辑) 2019年英语新同步浙江专用必修三讲义：Unit 1 Section Ⅲ Grammar—情态动词（Ⅰ） Word版含答案

Section_ⅢGrammar—

情态动词（Ⅰ)

语法图解

探究发现

①Festivals can also be held to honour famous people。

②Some festivals are held to honour the dead or to satisfy the ancestors， who might

return either to help or to do harm.

③Most ancient festival would celebrate the end of cold weather， planting in spring

and harvest in autumn。

④For the Japanese festival Obon, people should go to clean graves and light incense

in memory of their ancestors.

[我的发现]

以上四个句子都使用了情态动词。其中，第①句中的can表示许可,意为“可以”；第②句中的might表示推测，意为“可能会”；第③句中的would表示过去习惯性动作，意为“过去常会”；第④句中的should表示劝告或建议,意为“应该”。

情态动词练习题

1 1. She __________ swim.

2. When she was ten years old, she ___________ play the guitar.

3. The radio ___________ be fixed in 30 minutes.

4. With the help of the teachers, I _______________ make much progress.

5. ________ you pass the NMET!

6. __________ you be young forever!

7. __________you succeed!

8. I ________________ go now. Someone is waiting for me.

9. If there is no bus, we ________________ walk home.

10. You ______________ finish your homework on time.

11. He _____________come or may not.

12. Peter _________ come with us tonight, but he isn’t sure yet.

13. Lily __________ be back home at 7, because she is off duty at 5.30.

14. It _______________ be Mr. Li. He has gone home.

15. Don’t believe him. His story ________ be true.

16. The door bell is ringing. Who ___________ it be?

▁▂▃▄▅▆▇█▉▊▋▌精诚凝聚 =^_^= 成就梦想 ▁▂▃▄▅▆▇█▉▊▋▌

▃ ▄ ▅ ▆ ▇ █ █ ■ ▓点亮心灯 ~~~///(^v^)\\\~~~ 照亮人生 ▃ ▄ ▅ ▆ ▇ █ █ ■ ▓ 情 态 动 词

情态动词表示说话人的语气和情态。如需要、可能、愿意、怀疑等。情态动词有一定的词义，但不完整，必须和主要动词的原型一起构成谓语。常用的情态动词有：can, could, may,

might, must, have to, ought to, need, dare, shall, will, should, would, be able to,及半情态动词be to

do, had better等。

情态动词的基本用法：

（一）can“能够”

1.表示体力或脑力方面的能力，或根据客观规律能做某事的能力。如：

He can speak English. I can go there now.

注意

(1)can表“能够”时，既可指现在也可指将来。

(2)can与be able to的区别：

① 表“能力”时二者同义

No one can / is able to do it.

② be able to常侧重经过努力有能力做到，有多种时态。can侧重自身的能力，只有一般现在时和一般过去时。

③ was / were able to do表示通过努力克服困难或在一定的条件下成功地做了某事，侧重结果，相当于managed to do或succeeded in doing...。could仅表自身的能力或本领，但未必成功做到。

With the help of the firemen, they were able to leave the burning house.

He was able to swim across the river.