when引导的时间状语从句

由 高老师 分享时间：2024-03-13 06:26:26

一、有“当……的时候”的含义(=at the time that...),此时when后的从句是用来说明前面主句动作发生的背景.例如:

James pretended to be deaf when I spoke to him.当我和詹姆斯讲话的时候,他假装耳聋.

二、有“正……忽然……”的含义,表示突然发生某事.此时是when前的主句说明when后面句子之中动词动作发生的背景.例如:

I was about to leave my office when the telephone rang.我正要离开办公室时,忽然电话铃响了.

注意:在这种句型中一般不可把when放在句首.

三、有“无论什么时候……”的含义,与whenever的意思差不多,但语气较轻.此时when后的从句说明主句动词动作发生的背景.例如:

When the wind blows,all the doors rattle.只要风一吹,所有的门都吱吱嘎嘎作响.

四、有“本该(可)……而(却)……”的含义,此时when含有对比意义.例如:

They have only three copies when we need five.我们本该需要五本,而他们却只有三本.

五、有“既然……”的含义.此时when从句说明主句的理由或是一种借故.例如:

I can’t tell you anything when you won’t listen.既然你不想听,我就不告诉你了.

六、有“如果,要是(=if)”的含义,此时when从句表示条件,意思上接近“在……的情况下”.例如:

Come when you are ready.如果(要是)你准备好了,就来吧.

七、有“还没(刚刚)……就……”的含义,此时表示主、从句的动作几乎同时发生.例如:

I had hardly opened the door when he hit me.我刚开门,他就打我.

八、有“那时或然后”的含义,此时when前往往有“,”号.例如:

They arrive at 6,when we all have dinner.他们六点到,那时(然后)我们大家一起吃饭.

九、有“其实或虽然……但是……”的含义,此时when的意思接近although.例如:

She stopped trying,when she might succeed next time.她不再尝试了,其实下一次说不定会成功.

注意:有时when引导状语从句时,在不影响文意的情况下往往将从句中某些成分省去,因此,常常会出现以下结构:

1.When+现在分词.例如:

When sleeping,I never hear a thing.睡觉时,我什么都听不见.

2.When+过去分词.例如:

This dictionary will look nice when printed.这本词典印出来时会很好看.

3.When+名词或形容词.例如:

When a boy,he was sick all the time.小的时候,他经常生病.

4.When+介词短语.例如:

When at Rome do as the Romans do.入乡随俗.

1、一般现在时 every …, sometimes, at …, on Sunday,

2、一般过去时 yesterday, last week, an hour ago, the other day, in 1982, just now

3、一般将来时 next…, tomorrow, in+时间

4、现在完成时 for, since, so far, ever, never, just, yet, till/until, up to now, in past years, always, recently

5、过去完成时 before, by, until, when, after, once, as soon as

6、过去进行时 this morning, the whole morning, all day, yesterday, from nine to ten last evening… when, while

7、将来进行时 soon, tomorrow, this evening, on Sunday, by this time, tomorrow, in two days, tomorrow evening