成人英语三级考试情态动词综合用法(2)

2011-11-10 00:00:00来源:新东方论坛

4)(用于否定句、疑问句或感叹句中)表示猜测、怀疑或惊诧

How can / could you be here ? 你怎么会在这儿?

She couldn't / can't be so stupid to do that .

她不可能蠢得去做那种事吧。

He couldn't / can't be over seventy .他不可能有七十多岁了。

Where could / can the boy be now ? 那孩子现在能在哪儿呢?

另外,could还常用于表示较客气委婉的看法、提问及用于虚拟语气的结构中。这时候,could就不可以看作是can的过去式了。而是could自己独特的用法。如:

Could you speak a little slowly ?

您能稍微说慢一点儿吗?

I'm afraid that we couldn't give you any definite answer at this moment .

恐怕我们这时候还无法给予您任何确切的答复。

I could come earlier if asked .

如果要让我早一点来,我可以来早一点。

We would appreciate it if you could offer us any help .

如果您能为我们提供帮助的话,我们将不甚感激。

You could have done better if you had worked harder at it .

如果你再加把劲,本来可以干得更好一些的。

may , might 或许,可能,可以

(might可以看作是may的过去式,这两个词除了时态不相同外,在表达意思的许多方面是相近的。当然may 和might又都有一些各自不同的独特用法。)

1)可能性

I may be busy from tomorrow on .从明天起我可能会忙起来。

You may catch sight of the sunrise from here when you get up before 5 in the morning .你在早晨五点钟以前起来,或许能从这儿看到日出。

I wondered if they might agree with the idea .我想知道他们是否会同意这种想法。

She thought it might be wise to try her luck here .

她认为在这儿碰碰运气也不错。

2)表示允许

May I come in ? 我可以进来吗?:

I'd like to have a smoke here if I may .

如果可以的话我想在这儿抽一支烟。

The librarian told her that she might return the book to the library in three days .

图书馆理员告诉她说,她可以在三天后还那本书。

At the press conference , a news reporter asked the chairman if she might trouble him with a question about Taiwan issue.

在记者招待会上,一位新闻记者问大会主席她是否能提一个有关台湾问题方面的问题。

本文关键字: 考试

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