老师提问的 救急、、

题目

老师提问的 救急、、
在In the fields,farmers use too many chemicals which destroy the soil.
此句中(which destroy the soil）作定语 这个我知道!
但老师问 为什么用which 而不用别的词?

答案

which 关系代名词,that关系代子句,这里特指chemicals,所以用which
which 做连词的用法
(用做关系代名词)那一个, 那一些
He also had a gun with which to defend himself. 他还有一把自卫用的枪.
He invited us to dinner, which was very kind of him. 他邀请我们吃晚饭, 他这麼做真是太客气了.
She was very fond of speaking French, which indeed she spoke well. 她很喜欢讲法语, 而且确实讲得不错.
He lives in the house which is opposite ours. 他住在我们对面的那栋房子里.
that 做连词的用法
(引导名词子句)
He expressed the hope that we would keep in touch with his firm. 他表示希望我们与他的公司保持联系.
My idea is that we should act on his suggestion. 我的意见是我们应当按照他的建议去办.
That she is still alive is a relief. 她还活著, 这是令人感到宽慰的.
2.
(引导副词子句, 表示原因或理由)因为, 由於
We are glad that we have accomplished another arduous task. 我们都感到高兴因为又完成了一项艰钜的任务.
3.
(引导副词子句, 表示目的或结果)为了, 以至於
He is working hard that he can catch up with the class. 他努力用功, 以便赶上班上同学.
4.
(引导表示愿望, 感叹的子句, 主句常省略)
That I could stay at home today! 今天要是我能待在家里多好呀!