情态动词表推测用法小结

情态动词表推测用法小结 | 楼主 | 2017-10-15 12:34:21 共有3个回复
  1. 1情态动词表推测用法小结
  2. 2情态动词表推测用法小结
  3. 3情态动词表推测的用法小结

用于肯定句中表很有把握的肯定推测译为,用于肯定句中语气不很肯定译为,他一定可能也许知道这个问题的答案,对将来情况的推测用情态动词动词原形,他一定可能也许正在听收音机。

情态动词表推测用法小结2017-10-15 12:31:48 | #1楼回目录

情态动词表示推测的用法

1.用于肯定的推测:must > can > could > may > might 1)其中must语气最强最肯定,只用于肯定句,意为“一定,准是,必然会”。 You haven’t eaten anything since this morning, 2) can次之一般表示理论上可能性,但实际未必会发生。意为“可能”。mistakes.

3) could再次之,意为“可能” My book has disappeared. Who could have taken it?

4) may / might语气最弱,表示无把握的推测,意为“可能,或许”。 (might比may 更加不肯定,更无把握)。例如:

I’m not sure.

2. 用于否定的推测can’t >couldn’t > may not > might not

1)can’t用于否定推测,是语气最强的否定推测,意为“不可能,一定不(是)”。He hospital.

2)couldn’t 比can’t 语气弱,表示某事不可能真实,但自己也不是很肯定。

at school now.

3). may not/ might not表示否定推测时,表示(无把握的)否定推测,意为“可能/或许不”。 例如:

It’3.用于疑问句的推测,一般只用can/could Who can it be at the door? Can it be Tom?

情态动词表推测用法小结2017-10-15 12:31:38 | #2楼回目录

情态动词表推测用法小结

情态动词must, can/could/may/might

可以用来表示对事情进行推测。

(一)情态动词对现在事情进行推测--------情态动词+ 动词原形(do)

1.must 用于肯定句中,表很有把握的肯定推测,译为“。。。一定。。”

Eg: It’s already 12:30.You你一定饿了.) now.(他一定在办公室工作)

2.can 用于否定句或疑问句中,很有把握的否定推测,译为“….不可能…”/….可能…..”

short.(不可能是个警察) for the opening ceremony?

(他怎么可能会不准时参加开幕式呢?)

3 may /might 用于肯定句中,语气不很肯定,译为“。。。可能。。”

---Are you come to the party? ---- I’m not sure. I concert instead.

(二)情态动词对过去事情的推测.---- 情态动词+ have done。 1 must have done-----一定做过。。。

2 can’t/couldn’t have done -----一定没做过。。。

3 might /could have done -----可能做过。。。

Eg: I didn’t hear the phone. Iasleep.(我一定是睡着了.)

Jack me.( Jack不可能已经到了)

Sorry I’m late . I to sleep again.

(可能把闹钟关闭后又睡着了)

注意:must have done 结构中反意疑问句的用法.

----

句中有表过去时间的词,反意问句部分用过去时;句中无表过去时间的词,反意问句部分用完成时。

1 The children must have watered the tomatoes yesterday,

2 They must have been very tired3 The minister must have arrived in Shanghai , (三)情态动词表责备语气

1 should /ought to have done

------本应该…而没做了(表强烈的责备或遗憾的语气)We should have studied last night, but we went to the concert instead.

I was really anxious about you. You shouldn’t have left home without a word.

2 could /might have done---本可以做…而没做

(责备或遗憾的语气比should /ought to have done 弱)He might have given you more help, even though he was very busy.

3 needn’t have done------本不应该做。。而做了There was plenty of time. She needn’t have hurried.

情态动词表推测的用法小结2017-10-15 12:33:29 | #3楼回目录

情态动词表推测的用法小结

(一)情态动词表推测的三种句式

1.在肯定句中一般用must (一定),may(可能),might / could(也许,或许)。

(1)He must/may/might know the answer to this question?

他一定/可能/也许知道这个问题的答案。

(2)It is cold in the room. They must have turned off the heating.屋里很冷,他们肯定把暖气关了。

2.否定句中用can’t / couldn’t(不可能), may not/might not(可能不)。

(1)It can’t/couldn’t be the headmaster. He has gone to America.这不可能是校长,他去美国了。

(2)He may not/might not know the scientist.

他也许不认识那位科学家。

3.疑问句中用can/could (能……?)。

(1)Could he have finished the task?

他可能把任务完成了吗?

(2)Can he be at home now?

他现在能在家吗?

注:以上三种句式中情态动词的语气按程度都是依次递减的。Might, could并非may, can的过去式,而表示语气较为委婉或可能性较校

二)情态动词表推测的三种时态

1.对将来情况的推测,用“情态动词 + 动词原形”。

(1)She must / may / might / could arrive before 5.

5:00前她一定/可能/也许到。

(2)She must/may/might/could walk miles and miles among the hills without meeting anyone.

她一定/可能/也许会在山里一连走好几英里而遇不到一个人。

2.对现在或一般情况的推测,用“情态动词 + be”,“情态动词 +be doing”或“情态动词 + 动词原形”。

(1)He must / may / might / could be listening to the radio now.他一定/可能/也许正在听收音机。

(2)He can’t ( couldn’t ) / may ( might ) not be at home at this time.这个时候他不可能/可能不在家。

(3)Mr. Bush is on time for everything .How can ( could ) he be late for the opening ceremony ?

布什先生一向准时,这次开幕式他怎么可能迟到呢?

3.对过去情况的推测,用“情态动词 + have +过去分词”。

(1)It must / may / might / could have rained last night .The ground is wet.

地湿了,昨晚肯定/可能/也许下雨了。

(2)The door was locked. He can ( could ) not / may ( might ) not have been at home .

门锁着,他不可能/可能不在家。

(3)Can / Could he have gotten the book?

难道他找到书了吗?

注:情态动词 should /ought to表推测时,意为“想必会,理应……”但与“have +过去分词”连用时,则又可构成虚拟语气意为“本应该做某事却没做”。例如:

(4)It’s seven o’clock. Jack should/ought to be here at any moment.现在七点钟了,杰克理应随时到达。(推测)

(5)She should / ought to have attended your birthday party, but she had to look after her mother in hospital. (虚拟)

她本该出席你的生日晚会的,可是她得在医院照顾她妈妈。

(6)Tom should not /ought not to have told me your secret, but he meant no harm. (虚拟)

汤姆本不该告诉我你的秘密,可是他并无恶意。

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