六年级英语情态动词

情态动词

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I believe I can do it best! 我相信我可以做到最好!

Ⅰ．情态动词主要要特征

表示某种情感态度的助动词，不能单独做谓语，有时态（现在时和过去时）变化，但没有人称变化．

Ⅱ．基本用法归纳

1．几个主要情态动词的形式

原形否定形式缩写形式过去时形式中文意思

can cannot= can’t could 能够，能，可以

may may not / might 可能，也许

must must not mustn’t had to 必须，肯定

should should not=shouldn’t / 应该，必须

2．情态动词＋动词原形构成句子谓语部分．

He can read. I can dance. We can’t hear you.

3．变问句时：将它与主语换个位．

Can he read? Can I dance? Can’t you hear me?

4．Must发问的句子否定回答较特殊．

Must I clean the room before I leave here?

Yes, you must. 肯定回答

No, you needn’t. 否定回答

5．May发问的句子，表示请求对方允许否．

May I take my turn to try?

Yes, you can./ No, you must not./ can’t.

6．Need一般在否定句和问句中作情态动词中，need发问的句子，肯定回答要用must.

Need we clean the windows? Yes, we must./ No, you needn’t.

7．could, might不仅仅是表示过去时，也表示委婉语气，或不肯定．

Ⅲ．基础练习

1．用恰当的情态动词填空．

（1）The cinema isn’t far from here. So you go there on foot. You go there by bus.

（2）Excuse me, I have a look at that photo?

（3）you work out this difficult problem without any help?

（4）This is a reading-room. You sing here.

（5）I come in? No, you .

（6）The red light is on. We stop.

（7）we hand in the exercises today? No, you . You hand them in tomorrow.

2．选择填空．

（1）—you like some more tea, sir?

—No, thanks.

A．Would B．May C．Must D．Shall

（2）—May I go now?

—No, you , You stay here.

A．needn’t; has to B．mustn’t; have to

C．can’t; must D．needn’t; must

（3）—Must I write all the words down now?

—No, you .

A．mustn’t B．can’t C．won’t D．needn’t

（4）—May I go out and play basketball now?

—No, you finish your homework first.

A．must B．can C．may D．need

（5）You worry about your son. He will get well soon.

A．needn’t B．can’t C．mustn’t

（6）—I come in, Mr. Green.

—Yes, come in, please.

A．Must B．May C．will D．Need

（7）He isn’t in school, I think he be ill.

A．can B．shall C．must D．may

（8）Cars, buses and bikes stop when the traffic lights change to red.

A．can B．may C．must D．need

（9）Henry be at home because he phoned me from the farm just now.

A．mustn’t B．isn’t able to C．may not D．can’t

（10）I have my own room in my house, so I do what I want in it.

A．must B．have to C．need D．can

（11）—Must I go with them tomorrow?

—No, you .

A．mustn’t B．shouldn’t C．needn’t d．can’t

（12）She know the answer, but I’m not sure.

A．maybe B．may be C．may D．must

（13）The city cleaners repeat their work many times a day during the duststorm season.

A．may B．can C．might D．have to

（14）—we go out and play basketball?

—Good idea!

A．Can B．May C．Do D．Shall

（15）You return the book now. You can keep it for another week.