1、why
关系副词why主要用于修饰表原因的名词(主要是the reason),同时它在定语从句中用作原因状语。如:
We don’t know the reason why he didn’t show up. 我们不知道他为什么没有来。
She didn’t tell me the reason why she refused the offer. 她没跟我讲她拒绝这项工作的原因。
与关系副词when和where不同,why可以换成that或省略。如:
That’s one of the reasons (why, that) I asked you to come. 这就是我请你来的原因之一。
另外,与关系副词when和where可以引导非限制性定语从句不一样,why只能引导限制性定语从句,不能引导非限制性定语从句。如:
他失去工作的主要原因是他喝酒。
误:The main reason, why he lost his job, was that he drank.
正:The main reason why he lost his job was that he drank.(同位语从句)
2、when
关系副词when主要用于修饰表时间的名词,同时它在定语从句中用作时间状语。如:
There comes a time when you have to make a choice. 你必须作出抉择的时候到了。
Gone are the days when they could do what they liked. 他们为所欲为的日子一去不复返了。
We’ll put off the picnic until next week, when the weather may be better. 我们将把野餐推迟到下星期,那时天气可能会好一点。
注意不要一见到先行词为时间名词,就以为一定要用关系副词when来引导定语从句,同时还要看它在定语从句中充当什么成分——如果在定语从句中用作时间状语,就用when;如果在定语从句中不是用作时间状语,而是用作主语或宾语,那就不能用when,而要用that, which等。如:
Don’t forget the time (that, which) I’ve told you. 不要忘记我告诉你的时间。
关系代词that / which在定语从句中用作动词told的宾语,正因为是用作宾语,所以也可以省略。
3、where
关系副词where主要用于修饰表地点的名词,同时它在定语从句中用作地点状语。如:
This is the village where he was born. 这就是他出生的村子。
That’s the hotel where we were staying last summer. 这就是我们去年夏天住的旅馆。
Barbary was working in Aubury, where she went daily in a bus.巴巴拉在奥伯里工作,每天得坐公共汽车去上班。
与前面when的情况一样,注意不要一见到先行词为地点名词,就以为一定要用关系副词where来引导定语从句,同时还要看它在定语从句中充当什么成分——如果在定语从句中用作地点状语,就用where;如果在定语从句中不是用作地点状语,而是用作主语或宾语,那就不能用where,而要用that, which等。如:
He works in a factory that [which] makes TV sets. 他在一家电视机厂工作。
© 2017-2019 超级试练试题库,All Rights Reserved.