定从中只用That不用which的情况1.在there + be 的句型中，句子的主语是先行词，而且又是物。
例如：There are two novels that I want to read.我要读的有两本小说。
There is no work that can be done now. 没有什么工作现在能做的了。
2.先行词是最高级或被最高级修饰时3.以Here is (are)开头的句子时。
例如：Here is a film that will move anyone.这是一部将使任何人受感动的电影。
Here are two books that I will buy.这是我要买的两本书。
4.It is (high)time +定语从句中。
例如：It is time that we should have a rest.我们应该休息了。
It is high time that they started out. 他们该动身了。
5.当先行词是way等词时，关系代词用that或者in which在定语从句中作方式状语时，在口语中，常可省略。
例如：This is the way that my father did this work.这就是我父亲做此工作的方式。
She admired the way in which I answered the questions.她羡慕我回答问题的方式。
6.在双重限定性定语从句中，如果一个从句用who或者which引导时，那么另一个从句用that引导。
例如：He is the student that I have ever see who can jump highest.他是我曾经看到过跳得最高的学生。
My brother studies in the school which is the most beautiful in our city that isn’t far from here. 我的弟弟在我们的城市最美丽的学校读书，并且离这儿不远。
定语从句的特殊情况一、只用that不用which的情况1、当先行词是all, little, few, much, something, everything, anything, nothing, none等不定代词时。
如：Everything that happened then was like a nightmare.当时发生的一切就像是一场噩梦。
I will tell him all that you told me at the ball.我要把你在舞会上跟我说的话全都告诉他。
2、当先行词被only, any, few, little, no, all, just, very（恰好的,表示强调）等词修饰时。
例如：The only thing that we could do was to wait.我们能做的只是等待。
That’s the very thing that we can do.那正是我们能做的事。
3、当先行词是序数词、形容词最高级或先行词被序数词或形容词最高级修饰时。
例如：The first place that we visited was the Great Wall.我们参观的第一个地方是长城。
This is the best novel that I have ever read.这是我看过的最好的小说。
4先行词中同时包括人和物时。
例如：We talked about the people and the villages that we remembered.我们谈论了我们记得的人和村子。
He asked about the factories and workers that he had visited.他问起他去过的这几家工厂和工人的情况。
5、当主句中有who, which时，而定语从句中也要用到who或which时，为了避免who…who,which…which等重叠，定语从句要用that引导。
英语定语从句用that不用which的情况1.当先行词是不定代词all, much little , the one, something, everything, anything, nothing,none时。
Do you have anything that you want to say for yourself?There was little that I could do for you.You should hand in all that you have.2.先行词前有all, much, little, only, no, any, every, few, very, some等词修饰时。
This is the very dictionary that I want to buy.The only thing that we can do is to give you some money.3.当先行词是形容词的最高级或序数词时，或先行词被形容词的最高级或序数词修饰时。
This is the best that you have done.This is the best film that I have ever seen.This train is the last that will go to Beijing.What is the first foreign film that you have seen?4.当先行词既有人又有物时。
The foreign guests spoke highly of the chikdren and their shows that they saw in the kindergarten.The students were talking about the teachers and schools that they had visited.5.主句是以who, which开头的疑问句时。
