Grammar and usage(1): Modal verbs: general introduction10分钟试讲教案

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M4U2

Grammar --- Modal verbs Step 1: Brief introduction 1、What are Modal Verbs ?

情态动词是一种本身有一定的词义,表示说话人的______,______或______的动词,但______ 能单独作谓语, 只能和其他动词原形构成谓语。情态动词无_______和______的变化, 情态动词后跟__________,否定式是在情态动词后面加 "not"。

2. How many modal verbs can you think of ? can

3. What are the functions

of modal verbs?

1) Ability （能力）

5) Make requests（提出请求）

2) Obligation （义务）

6) Make suggestions（提建议）

3) Certainty （可能性）

7) Make offers（提供帮助）

4) Permission （允许）

8) Give advice（提出意见）

may

will

should

must

need

Step 2: Functions of modal verbs 1. Ability （能力）

Liu Xiang ______ run the 110m hurdle race within 13 seconds.

can /could: 1）

can 一般表示_______________或者一种_______________。

a) Fish can swim in the water. b) Learning English ______ be difficult. 2）

在疑问句中，用could可表示请求，语气较委婉。

a) —______ you lend me some money?

— Sure.

b) He asks if he ______ smoke here. 3）

表示惊异、怀疑、不相信的态度。（主要用在否定句、疑问句或惊叹句中）

a) He’s such a nice person that he _____ commit the crime.

b) Can this be true?

c) How can you be so careless! 4)

can not…too表示“越…越好”，“无论怎样…也不过分”。

You ______ be ______ careful while crossing the road.

can /be able to的区别

(SB P30

1.) 1. 2. 3.

1

构建一套完整的语法体系,为全面提升英语能力打下坚实的基础！

could与

was/were able to 相同点：二者都可表示“______________”。(meaning a person had a certain ability to do sth.) 不同点：was/were able to 还表示

“______________________________________”。

= managed to do sth. / succeeded in doing sth. 1) My father ________ speak five languages at that time.

2) A big fire broke out in ABC hotel yesterday. Luckily, everyone ____________ run out of the

building.

2) Obligation （义务）

ought to/should ,

have to ,

must a)

You mother brings you up and takes good care of you, so when she is old, you ________ look after her in return. b)

He found he had left his keys in the classroom, so he________ wait outside until his parents came back.

mustn’t / needn’t

a)

High school students _______ smoke at school.

(

) b)

You _______ watch the game if you don’t want to.

(

)

3) Certainty （可能性）

Attention:

might, may, could, should, ought to, will, must

4) Permission （允许）

can/could, may/might 1)

表示允许或请求对方许可might/could 比may/can语气更委婉。

—

Might/May/ I use your computer?

—

Yes, you_________.

—

No, you _________. 2) 用于祈使句中表

________。

May you be happy all your life.

3)

表示推测、可能（只用于______ , 否定句、疑问句中要用can或could）。

He may be very busy now. He _______ be busy doing his homework, because I chat with him on the Internet.

5) Make requests（提出请求）

________ you help me with my training?

Attention:

will, can, could, would

6) Make suggestions（提建议）

shall: 2

构建一套完整的语法体系,为全面提升英语能力打下坚实的基础！

1) shall用于第___、 ___人称疑问句，表示征求对方的意见、向对方请示或提供帮助。

a) Shall we begin our lesson?

b) When shall he leave?

c) Shall I carry this bag for you? 2) shall用于第___、 ___人称，表命令、警告、威胁、强制、允诺、规定等。

a) You shall

fail if you don‘t work harder.

b) He shall be punished.

c) He shall have the book when I finish it.

7) Make offers（提供帮助）

will/would: 1)

表示______、______等，would比will 更客气委婉。

Sentence patterns:

2)

表示______、______和______。

I will never do that again. 3)

表经常性、习惯性、倾向性。译为

“______、

______、______”。

a)

He will sit there for hours, doing nothing at all. b)

The old man would have a smoke under a big tree every afternoon after he finished his

farm work. c)

The door _______ open.

Attention:

I will go to the park with you tomorrow if you will offer me lunch.

8) Give advice（提出意见）

should: 1) should表示劝告、建议、命令，其同义词是___________；在疑问句中，通常用should

代替ought…to。

a) You should take regular exercise every day.

b) Should I open the window? =

2) 用在表建议, 命令, 要求等动词后的

__________中。

My friends suggested that I _________ pay a visit to shanghai next month.

3) 表示惊讶, 失望, 恼怒、生气等情绪。

a) I am really surprised that he should talk to his parents that way. b) I think it is dreadful that anyone should be so miserable.

我认为，竟然每个人都如此伤心就太糟糕了。

c) Why should you talk like that?

你干吗这样说话？

d) A: What’s Susan’s phone number?

苏姗的电话号码是多少？

B: How should I know?”我怎么知道？

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构建一套完整的语法体系,为全面提升英语能力打下坚实的基础！

4)

should +have +done，表示___________________________________。

I should have written

to you earlier, but I’ve really been busy.

我本应该早就给你写信的；不过我真的一直都很忙。

5）1. The boys may be playing football on the playground.

2. He plays basketball very well. He must have practiced it a lot. Step 3: Practice

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