定语从句中that和wich、who等词的用法

Question

定语从句中that和wich、who等词怎么用?

Answer 1

that, which 和who在定语从句中做关系代词，指代人或物。
1）that和which主要在定语从句中做主语或宾语，指代物；
比如：This is the place which/that I visited last year
2）who在定语从句中做主语，指代人；
比如：The girl who is standing under the tree is my younger sister.
3) 有几种情况只能选择that:
1.当先行词是或被序数词，最高级，不定代词修饰时，关系词用that不用which。 　　
2.当先行词既有人又有物时，用that。 　　
3.当先行词带有the only,the very,the same,the last,the one等词时，用that不用which。 　　
4.当主句中有who或which时，为避免重复用that

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Answer 2

简单而言“
that 指人或者物 主语或者宾语，非限制定语从句不能用。
which 指物 主语或者宾语
who 指人 主语或者前面没有介词的宾语
以上三个词在定语从句中作宾语时可以省略。
例如：a man that/who is smoking there
a man who/that I spoke to just now
the book that/which i read just now
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Answer 3

who用于人that人或物

Answer 4

1、 who指人，是主格，在定语从句中作主语。例如：
This is the girl who is the most beautiful in our school.
2、whom指人，是宾格，在定语从句中作宾语，可省略。例如
This is the girl whom I’d like to make friends with.
3、whose既可指人又可指物，是所有格，在定语从句中作定语。例如：
This is the girl whose father is our headmaster.
This is the tree whose branches are dead.
4、 that既可指物也可指人，既是主格又是宾格，在定语从句中既作主语又作宾语，作宾语时可省略。例如：
①This is the bike that was stolen yesterday.
②Have you found the key that your brother lost?
③This is the doctor that fights bravely against SARS.
④Li Ping is the student that our teacher often praises.
5、 which只可指物，既是主格又是宾格，在定语从句中既作主语又作宾语，作宾语时可省略。例如：
This is the book which can help you. This is the pen which you lost yesterday.