英语----情态动词(上)

// 情态动词

 

You can park your car here. //   允许 语气

You must park your car here. // 禁止 语气比较严厉

You'd better park you here. // 劝告

  

语气                                                    推测                               虚拟

can/could   may/might must

 

Can         VS      be able to 

 

I can speak  English   but     I     can't     speak     Spanish.

Despite    his  handicap  he  is  able  to  drive.

He  managed   to   get on train  without a  ticket.

 

Can  : 表示能力         be able  to   表示一种能力

// 表示请求或者可能

Can he have said so?

Can it be true.

Can it be true?

 

Could you lend me some money? 

What he said  could be true, but i still doubt it.

I could do the job today, but i rather  put it off until tomorrow.

What he said  could be true, but i still doubt it. // 轻微怀疑

i could do the job today, but i'd rather put it off untill tomorrow. // 

 

必备惯用语:  can't .... to  在怎么样也不为过.....

I  can't thank you too much.

I  can't see you too often.

You can  never be too carefull  when you cross the road.

can't 

 

I can't help laughing// 情不自禁做某事.....                  can't help doing    ======can't help onself.

I can't help  to repair you bike// can't                              can't help to do............ 

I just can't help it.                    can't help it.

 

 

One  cannot succeed  without  perseverance

Man cannot live without air.

 

He  may  konw the truth. 

He may be waiting for you right now.

They may have got lost.

 

May  I  use your pen ?

May  I  smoke here?

 

maybe 副词

may be   系动词   系表结构

may  >  might      He/may  might be very busy now.

 

May she come this afternoon?// be likely to do 

Do you think

may well to  He has changed so much. You may well not recognize him.

may/might as well do     You may/might as well stay at home tonight.

may/ might as well do  A as do B    You may/might as well throw the money away sa lend it to him.

 

 

May you succeed.

Come what may, i will never betray you.

 

You must arrive in time.                           必须

You musnt't do (不准)park car here.           不准

You must be Eva.                                     一定

All men must die.                                     必然会

 

Warm clothes are a must(必须) in the moutains.

 

Must I finish the work today?        Yes, you must.

                                                 No, you needn't.

                                                 No, you don't have to. 

 

have to 和 must 区别

// have to 客观的需要   不得不照顾

My brother was very ill, so I had to look after him.

I had to work when i was your age.

have 有时态变化     don't   have  to   不必

 

 

must  主观

You must get your work done by this Friday.

must 没有时态变化   musn't do: 不准做....事情