定语从句只用that的情况

1. 当先行词为all, much, little, none及由any, every, some, no所构成的复合不定代词时。如：We should do all that is useful to the people.

2. 当先行词被any, few, little, no, all, much, some等词修饰时。

如：You can take any seat that is free.

3. 当先行词为序数词或被序数词所修饰时。

如：When people talk about the cities of China, the first that comes to my mind is Beijing.

4. 当先行词为形容词最高级或被形容词最高级修饰时。

如：The best that I could do was to apologize.

5. 当先行词被the very, the only, the last, the just, the same等修饰时。

如： This is the very book that I’m looking for.

注意：先行词被the same修饰时，关系代词也可用as。

6. 当先行词既包含人又包含物时。

如： They are talking of the heroines and their deeds that interest them.

7. 当先行词是疑问代词who，which，what或主句以这些词开头时。

如：Who that has ever worked together with him doesn’t admire him?

8. 当先行词为主句表语或关系代词为从句表语时。

如：That’s a good book that will help you a lot.

Our school is no longer the place that it used to be.