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英语的情态动词和特殊句型的用法

发布时间:2013-06-21 13:13 ? 浏览次数:

英语的情态动词和特殊句型的用法
作者:西欧国际交友中心管理员    发布于:2013-06-21 12:32:33    文字:【】【】【
 

 

                                                          英语的情态动词和特殊句型的用法

 

                  发布者:linda 更新时间:20130621日 阅读 2123

1can may 表示可能,推测的意思

could would might 也表示可能,是can, will, may 的过去式

例如, I can go to school with you. Can I help you ? 是个很常用的句型

I may help you . May I help you ?

Could you like something to drink ? 你想要什么饮料去喝吗?

Would you like a bottle of soda to drink ? 你想要一瓶苏打水吗?(语气更委婉和礼貌)

I might go there. 我可能去那儿( might may的可能性还要小。)

2Can not may not 否定句

could not would not might not 否定句

例如, I can not do like this 我不能够那样做(语气比较肯定)

I may not know about it 我可能不知道关于这件事

I could not go to the cinema 我可能不能够去电影院(假设的成分很大)

I would not join this club

I might not go anywhere 我可能到哪里都去不了。

3, can be 例句,( It can be anything .

can't be -------------------> must be (可能是------>一定是)

can't be doing ---------------> must be doing sth (不可能做某事---->一定在做某事)

can't have been doing --------->must have been doing

例如,

She can't be thirty -------------> she must be forty 她不可能三十岁,她一定四十了。

she can't be reading------------>she must be playing in the garden.

她不可能正在读书,她一定在花园里玩耍。

She can't have been ill ----------->she must have been tired.

她不可能病了------------>她一定是很累了。(这事已经发生)

She can't have been writing-------- >she must have been walking outside yesterday.

You can't have been driving 40 mile a hour---->you must have been driving 60 mile a hour

你不可能驾车时速一小时四十码----->你一定驾车一个小时60

4 can be able to 的区别

1> can 表示可能 could 是过去式 可能的意思

be able to 表示一种能力,能够

he will be able to run the same speed as you . 他将能够和你跑的一样快。

2>成功地做了某事时,用was/were able to 不能用could

she was able to run away before the fire started. 他成功逃跑在起火之前

5, ought to should应该

you ought to be able to finish this job by yourself 你应该能够独立完成这个工作

you should do this by yourself .

6need dare

need to do sth 需要做某事

needn't to do sth 不必做某事

don't dare to do something 不敢做某事

dare not do sth 不敢做某事(中间的to 有时可以省略)

例句: If you don't dare to do something ,you don't have enough courage to do it.

如果你不敢做某事,你没有足够的勇气。

Many people hate Harry but they don't dare to say it .

许多人恨海瑞,但是他们不敢说。

The manager give him a hard time, but he dare not tell his boss.

经理总是刁难他,但是他不敢告诉老板

Dare you take a risk to climb this mountains ? 你敢冒险爬这座山吗?

7 would rather do 宁愿做某事

would rather not do 宁愿不做某事

would rather....than 宁愿做......而不

例句,I would rather drink water, I don't like to eat food. 我宁愿喝水,我不喜欢吃东西

I would rather not eat food, I like to drink water. 我不愿吃东西,我喜欢喝水。

I would rather go to school than stay at home. 我宁愿去学校,而不喜欢呆在家里

I would stay at home rather than go to school.

8 had better do sth 最好做某事

had better not do sth 最好不做某事

例句。you 'd better give up ,it is too difficult to you . (you' d better = you had better)

你最好放弃,因为对你来说太难了。

You had better not go there, it is too dangerous to you .

你最好不要去那儿,因为对你来说太危险了。

9总结情态动词的时态

can could may might must

1>情态动词+动词原型 where is he ? he may be in the pub 他可能在酒吧里

2>情态动词+现在进行时 he must be drinking at that moment. 那个时刻他一定在喝酒

3>情态动词+现在完成时 he would have gone home at 8 o'clock. 八点钟他可能已经回家了

4>情态动词+现在完成进行时 he must have been looking for you all night.他一定整个晚上都在找你。



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