“betodo”的用法

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“betodo”的用法

be +动词不定式(即be + to do sth.)的用法如下:

1.表示按计划或安排要做的事。例如:

When are you to leave for home?你什么时候回家?

The Queen is to visit Japan in a week’s time.女王将于一周后访问日本。这种结构也可用于过去。was / were to do sth. 表示曾经计划要做的事,但不表明计划是否被执行,或表示“命运(即命中注定要发生的事)”,而非计划;was / were to have done sth.表示未曾实现的计划。例如:

I felt nervous because I was soon to leave home for the first

time.我感到很紧张,因为我很快就要首次离开家了。

They said goodbye, little knowing that they were never to

meet again.他们告了别,不知道以后再也不会见面了。

2.表示“应该”,相当于should, ought to。例如:

You are to report to the police.你应该报警。

What is to be done?应该怎么办呢?

3.表示“必须”,相当于must, have to。例如:

The letter is to be handed to him in person.这封信必须亲手交给他。

You are to do your homework before you watch TV.看电视之前你得先做完作业。

4.表示“想,打算”,相当于intend, want。例如: If we are to be there before ten, we’ll have to go now.如果我们要在十点前到,我们现在就得走。

祝同学学习愉快。