阳西潮汐发电厂:定语从句中关系代词that 和which 要怎么分？

不能用关系代词Which的几种情况

1.当先行词为all, little, much, few, everything, none 等不定代词时关系代词用that而不用which. I will tell him all that you told me at the ball.
There are few books that you can read in this book store.

2.当先行词既有人又有物时,关系代词用that, 不用which.
He asked about the factories and workers that he had visited.

3.当先行词有形容词最高级修饰时,关系代词用that, 而不用which.
This is the best novel that I have ever read.
Guilin is one of the most beautiful cities that I have ever visited.

4.当先行词有序数词修饰时,关系代词用that, 不用which.
The first sight that was caught at the Great Wall has made a lasting impression on him. 5.当先行词被the only, the very, the same, the right等修饰时,关系代词用that,不用which.
That is the very thing that we can do.
It is the only book that he bought himself.

6.当先行词被all, every, any, much, little, few, no等修饰时,关系代词用that,不用which.
You can take any room that you like.
There is no clothes that fit you here.

7.当主句是以which开头的特殊问句时,定语从句关系代词一般用that而不用which.
Which of the books that had pictures was worth reading?

8.在强调句型" It is ... that ..." 中,只用that,不用which.
It is in this room that he was born twenty years ago.

9.在" such (the same) ... as ..." 句型中,关系代词要用as, 而不用which.
We need such materials as (not which) can bear high temperature.

10.表示" 正如... 那样 "," 正象..." 之意时, 用as, 不用which.
Mary was late again, as had been expected.

11.As 引导的定语从句可以放在主句前面, 也可以放在主句后面或主句中间,而由 which引导的定语从句只能放在主句后面。
As we all know, oceans cover more than 70% of the earth.

两词都是指物的,至于怎么分,我也没弄清呢,去问问老师吧,我也得问问老师.

1.两个词都可以做限定性定语从句的主语和宾语
并且作宾语时可以省略
2 不同是作主语时 which指物that既可指人又可指物
3.当先行词是不定代词，如anything ,some时
或最高级如 the tallest boy 或序数词时 the first book， 只可以用that
4.非限定性定语从句时，就是两句之间有逗号时
只能用which

还有在非限制性定语从句中，that和who不能引导从句

定语从句中只能用that而不能用which的情况很多，所以方便起见，建议你记住只能用which的情况：
1) 介词的后面 2)非限制性定语从句 3)先行词是that的
其他的都可用that