在定语从句中,很多同学不知道什么时候用which?什么时候用that?什么时候用when等等。现在,我们就一起来弄个明白,以后四六级写作、翻译不要再错啦!
①
which引导的非限定性定语从句来说明前面整个句子的情况或主句的某一部分 (that不能用于引导非限制性定语从句)。
例如: Her house,which was built a hundred years ago,stood still in the earthquake.
那座房子在地震中依然耸立,它是一百多年前建造的。
②
when,where引导非限制性定语从句时,作定语从句的状语:
when =and then
where =and there
注意,why永远不能引导非限制性定语从句。
如:
We will put off the outing until next week,when(=and then) we won't be so busy.
我们把郊游推迟到下个星期,当我们不忙的时候。
Furthermore, these highways generally connect large urban centers, which means that they become crowded with heavy traffic during rush hours, when (=and then) the "fast, direct" route becomes a very slow route.
此外,这些高速路通长江大城市连接在一起,在上班高峰时便由于人流密集而造成严重的堵车,继而这些“快速直达的”高速路变成了行驶缓慢的道路。
③
另外 when前面加了介词时,when=then ,如:
That was in 1929, since when things have been better.
那是在1929年,从那时起情况就已经好转了。
④
还有一种请况就是when可以用prep which替换,如:
I still remembered January 10, on which /when he came to see me.
我仍然记得1月10日,他来看我的那一天。