定語從句什麼時候用it

定語從句什麼時候用it？相信很多人都想知道吧？以下是小編為您整理的定語從句什麼時候用it相關資料，歡迎閲讀！

　　A. 以下情況多用that.

(1) 如果先行詞是all, much, anything, something, nothing, everything, little, none等不定代詞，關係代詞一般只用that，不用which。例如：

All the people that are present burst into tears.

Is there anything that I can do for you?

(2) 如果先行詞被the only, the very, the same, the last, the best等詞修飾，關係代詞常用that(指人時，可以用who),例如：

This is the very book that I want to find.

That is the best film that we have seen.

I was the only person in my office that/who was invited.

(3) 當先行詞被all, every, no, some, any, little, much所修飾時；

You can take any seat that is free.

(4) 當先行詞被序數詞或形容詞最高級所修飾時。

It is the first foreign book that I have ever seen.

This is the most beautiful flower that I have seen.

(5) 在there be句型中，常用that.

There is a man that lives in that village.

(6) 先行詞有兩個，一個指人，一個指物，關係代詞應該用that。例如：

The boy and the dog that are in the picture are very lovely.

　　B. 以下情況不能用it，用which.

(1) 當關系詞前面有介詞時，指物常用which.

The prize for which he worked so hard was a new bike.

He built a telescope through which he could study the skies.

(2) 非限制性定語從句指物時，多用which.

Bamboo is hollow, which makes it light.

He wrote an article, which tells us about the computer.

(3) 如果先行詞本身是that時，只用which.

This is that which he bought yesterday.

(4) which還有一種特殊用法，它可以引導從句修飾前面的.整個主句，代替主句所表示的整體概念或部分概念。在這種從句中，which可以作主語，也可以作賓語或表語，多數情況下意思是與and this 相似，例如：

He succeeded in the competition, which made his parents very happy.

it是人稱代詞,作主語或者賓語.但是從句中關係代詞作主語和賓語時就不能使用it了，定語從句中引導詞可以是who ，which，where，whom，that，但不能用it