定语从句中什么时候用that 不用which,什么时候相反

来源：学生作业帮编辑：拍题作业网作业帮分类：英语作业时间：2024/05/17 10:33:02

一.用that不用which
1）先行词是最高级或他前面有形容词最高级时
This is the best --that-- has been used against air pollution in cities.
English is the most difficult subject --that-- you will learn during these days.
2)先行词是序数词或它前面有一个序数词时
He is the last person --that-- i want to see.
3)主句中有疑问句
Which is the pen --that-- you lost?
4)先行词既有人又有物时
The bike and its rider --that-- had run over an old man were taken to the police station.
5)先行词是 all, much, little ,something,everything,anything,nothing,the one时
6）先行词前有 only,any,few,little,no ,all,one of,the same, the very等词装饰时
7）有2个定语从句,其中一个关系代词已用which,另一个应用that.
Tom built up a factory which produced things that had never been seen before.
二.用which不用that：关系代词前有介词
This is the school in --which-- you will study.
.原句本来就有that
Let me show you the book --that-- i borrowed from the library --which-- was newly open.
哎,没分的,打那么辛苦白干了...T-T

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