where : 当先行名词在从句中当地点状语时,用关系副词where连接
例如:
The crime rate rises in cities where the unemployment rate increases. 句中的where = in cities, 表示行为发生的地点。
这里的要点是能否区分是用that 还是用 where, 即:是做主语、宾表语,还是做地点状语,例如:
I love the small town that we visited last week.
句中town做动词visited的宾语,即参观过的小镇,故用that连接。
I love the small town where I lived during my childhood.
句中town 是动词lived的地点,即童年时住过的小镇,故用where.
这也是定语从句的一个考点。
when : 当先行名词在从句中当时间状语时,用关系副词when连接, 例如:
July is the month when we have a lot of rain.
注意when定语从句后推的现象,例如:
I think the day will finally come when air pollution can be put under control.
放在主句后面作非限制定语从句时,when一般译为此时,那时, 例如:
The meeting will be put off until next month, when we will have made all the preparations.
另一个关系副词是why,由于它固定与the reason搭配, 即: the reason why,不难理解,一般也不作为考试的重点。例如:
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