定語從句的關係代詞Which若先行詞指物則代替先行詞在定語從句中充當主語或賓語，下面我們一起來看看具體用法吧！
從句中which的用法
This is the pen which was given by my friend.
先行詞 指物代替先行詞在定語從句中充當主語
This is the pen which my friend gave to me.
先行詞 指物代替先行詞在定語從句中充當賓語
下面是他和that在定語從句中的區別及用法：
that which在代物時常常可以通用,但有時只宜於用which ,不用that
(1) 關係代詞前有介詞時.
This is the hotel in which you will stay.
(2) 如有兩個定語從句,其中一句的關係代詞是that,另一句宜於用which.
Let me show you the novel that I borrowed from the liberary which was newly open (新開放) to us.
注意2that which在代物時常常可以通用,但有時只宜於用that ,不用which.
(1) 先行詞是形容詞最高階或者它的`前面有形容詞最高階時
This is the best that has been used against air pollution(反對空氣汙染) in cities.
English is the most difficult subject that you will learn during these years.
(2) 先行詞是序數詞,或它的前面有一個序數詞時
He is the last person that I want to see.
(3) 主句中已有疑問詞時
Which is the bike that you lost?
(4) 先行詞既有人又有物時
The bike and its rider that had run over (撞倒了)an old man were taken to the police station.
(5) 先行詞是all,much,little,something,everything,anything,nothing,none,the one等代詞時
You should hand in all that you have.
We haven’t got much that we can offer you.
I mean the one that you talked about just now.
(6) 先行詞前面有only,any,few,little,no,all,one of,the same,the very等詞修飾時
The only thing that we can do is to give you some money.
Li Ming is the only one that got full marks (滿分)in our class.
Li Ming is one of the students that want to be teachers in our class.
(7) 有兩個定語從句,其中一個關係代詞已用which,另外一個宜用that
Edison built up a factory(辦了一個工廠) which produced things that had never been seen before.
定語從句的關係副詞 Where的用法:若先行詞指地點且其在定語從句中充當地點狀語.
This is the house+I was born in the house.(=I was born there)
介詞短語副詞
=This is the house where I was born.這就是我在那兒出生的房子.
先行詞 關係副詞
in which I was born.
介詞+關係代詞
which I was born in.
關係代詞
這裡作介賓的which和that可以省略
that I was born in
定語從句中的that和which用法區別
that和which在從句裡都可以做賓語和主語，做賓語時可以省略。在定語從句中,有種說法叫"關賓省"，意思是關係代詞在限制性定語從句中作賓語可以省略，不管是that，which，還是whom。但是which能引導非限制性定語從句，that則不行。
其次，記得以下只能用that的幾種情況：
1. 當先行詞為all, much, little, none及由any, every, some, no所構成的複合不定代詞時。
如：
Please tell me anything that you know about the matter.
有關此事，凡是你所知道的請告訴我。
2. 當先行詞被any, few, little, no, all, much, some等詞修飾時。
如：You can take any seat that is free.
任何空著的座位你都可以坐。
