点击免费领取中考核心考点资料！

关系词只能选用that

① 当先行词为不定代词 something, anything, nothing, everything时

Is there anything that I can do for you?

② 当先行词为不定代词all时

Mr. Li does all that he can to do his work well.

③ 当先行词被all, some, any修饰时

These are all the things that I have done today.

④ 当先行词被the only, the very 修饰时

This is the only computer that he often turns to for help.

⑤ 当先行词被序数词，形容词最高级修饰时

This is the cleaning room that you can see here.

⑥ time 作先行词，前面有序数词或last修饰时

This is the last time that I’ll give you pocket money.

⑦ 尽管先行词指人，但关系词在句中作表语时。

He is no longer the child that he used to be 20 years ago

⑧ 以 who开头的特殊疑问句，尽管先行词指人。

Who is the person that is sitting on the ground ?

⑨ 当先行词包括人和物时。