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掌门一对一:情态动词语法知识总结

发布于 2018-05-11 18:00

  一、may和might

  ★ 都可示意容许。如:

  You may / might use my dictionary so long as you return it before 17:00.

  ★ 示意可能,might比may语气更不确定,示意的可能性更小。如:

  Do you think Mr. Jackson may / might be here on time?

  二、can和could

  ★ 都可示意才能。如:

  Even a small personal computer can store great amounts of information.

  I couldn’t get tickets; they were sold out.

  ★ 也可示意答应,could比can示意的谈话语气更含蓄。如:

  You can have my seat. I’m going now.

  Could I have a drink of water, please?

  ★ 还可示意谈话人的猜想,此时could不是can的过来式,它示意揣测的可能性比can小。如:

  Can he still be alive after all this time?

  If you’re not careful, you could get into even worse trouble.

  三、will和would

  ★ 可示意志愿,will示意如今的志愿,有时可用于条件句中,would示意过来的志愿(would如示意如今的志愿,语气较含蓄)。如:

  Ask, if you will, who the owner is.

  My friend asked if I would go with him.

  ★ 都可示意征求意见或提出申请。如:

  Will / Would you please make a cup of coffee for me?

  ★ 也都可示意习气和偏向性,will示意如今的习气,would示意过来的习气。如:

  These clothes won’t wash easily.

  When Ann was a child, she would often ask some strange questions.

  四、shall和should

  ★ shall在疑难句中用于征求对方意见,次要用于第一人称,也可用于第三人称,意为“要不要,……好吗”;shall在陈说句中示意谈话者的许诺、劝诫、要挟、命令、规则、偶然性等,次要用于第二人称或第三人称。如:

  Shall we go out and have a walk after dinner?

  Shall my sister come here now?

  You shall do as you see me do.

  Tell Betty that she shall have the bike tomorrow.

  ★ should示意任务或责任、倡议或劝说、推断等。如:

  We should take good care of our children.

  You should give up smoking and drinking.

  With an early start the young men should be here by 10:00 am.

  五、must和can’t

  ★ must可示意“必需做某事”,还可表揣测。如:

  All passengers must wear seat belts.

  Your father has worked hard all day. He must be tired.

  When you got lost in the forest, you must have been very frightened.

  ★ can’t可表否认的揣测和判别,意为“不可能”。如:

  If Jim didn’t leave home until six o’clock, he can’t be at the office yet.

  Somebody must have opened the cage because the lion can’t have escaped on its own.

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, may and might

. Can allow sketch. Such as:

You may / might use my dictionary so long as you return it before 17:00.

* might of May is more uncertain than may, less likely to sketch the tone. Such as:

Do you think Mr. Jackson may might be here on / time

two, can and could

? You can sketch to. Such as:

Even a small personal computer can store great amounts of information.

I couldn 't get tickets they were sold * out.

; also may indicate the promise, could more than can of the subtle tone. Such as:

You can have my seat. I m going now.

Could I "have a drink of water, please?

* can sketch people's guess, this could is not over can, the possibility of it is smaller than the can of speculation. Such as:

Can he still be alive after all this time

If you re not? Careful, you could get into even worse trouble.

three, will and would

. The show will wish, now will indicated the volunteer, sometimes used in conditional sentences, would sketch over (would of today's volunteer volunteer it is more subtle). Such as:

Ask, if you will, who the owner is.

My friend asked if I would go with him.

. All comments or apply sketch. Such as:

Will / Would you please make a cup of coffee for me?

* also may indicate the habits and bias of the will of today's habits, habits of over would of. Such as:

These clothes won t wash easily.

When Ann 'was a child, she would often ask some strange questions.

four, shall and should

. Shall in the difficult sentence to solicit opinions, mainly for the first person, also can be used for the third person, meaning "to,...... "OK," shall said in the old sentence, which signaled to the speaker's promise, exhortation, coercion, order, rule, contingency and so on, which was mainly used for the second person or the third person. Such as:

Shall we go out and have a walk after dinner

Shall my sister come? Here now?

You shall do as you see me do.

Tell Betty that she shall have the bike tomorrow.

. Should of task or responsibility, initiative, or persuade inference. Such as:

We should take good care of our children.

You should give up smoking and drinking.

With an early start the young men should be here by am.

must and can five, 10:00 "t

. Must may indicate the" must do sth, also can form speculation. Such as:

All passengers must wear seat belts.

Your father has worked hard all day. He must be tired.

When you got lost in the forest, you must have been very frightened.

can "t can deny speculation and judgment, meaning" impossible". Such as:

If Jim didn t leave home until six 'o' clock, he 'can t be at the office yet.

Somebody must have opened the cage because the lion can t have escaped on its' or own.

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