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在英语的非限制性定语从句中什么时候用as什么时候用which?怎样区别这两种用法?

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/05/14 03:58:20
在英语的非限制性定语从句中什么时候用as什么时候用which?怎样区别这两种用法?
在句子 she might possibly come,in which case i'll ask her.中为什么要用in which呢?那又再在什么时候用in which
在非限制性定语从句中,as可代表整个主句,引导的定语从句可以放在主句之前或主句之后,一般用逗号与主句分开.
He is from the south,as we can know from his accent.他是南方人,这一点我们从他的口音可以知道.
As we can know from his accent,he is from the south.
He,as we can know from his accent,is from the south.
as有时可指代主句中的一部分,从句后置.
Jane has served in the army for five years,as has her elder brother.
which也可以用于非限制性定语从句,指代先行词,从句只能放在先行词后;也可指代整个主句,定语从句只能放在主句之后.如:
He failed in the exam once again,which made his parents very disappointed.
至于你说的in which case,请参看以下部分.
介词+which+名词(which在非限制性定语从句中有时也可以作定语)
He usually returns home at ten,at which hour(在这时候) his father locks all the doors and
windows.
John stayed here for a week,during which time(在此期间)we visited the West Lake together.
It might snow this weekend,in which case(在这种情况下)we won't go to Beijing.