但在下列情況中,只能用 that,不用 which：
①當先行詞是 all,a lot,(a) little,few,much,none,anything,something,everything,nothing 等詞時.如：
All that can be done has been done.
In this factory I saw little / much that was different from ours.
②當先行詞被 all,any,no,much,little,few,every 等限定詞所修飾時.如：
We heard clearly every word that he said.
③當先行詞是序數(shù)詞或被序數(shù)詞所修飾時.如：
The first thing that should be done is to get the tickets.
When people talk about Hangzhou,the first that comes to mind is the West Lake.
④當先行詞是形容詞最高級或被形容詞最高級所修飾,以及先行詞被序數(shù)詞和形容詞最高級同時修飾時,如：
Is that the best that you can do?
That’s the most expensive hotel that we’ve ever stayed in.
This novel is the second best one that I have ever read.⑤當先行詞被 the very,the only,the next,the last等所修飾時.如：
This is the very book that I want to find.
⑥當先行詞為指人和指物的兩個并列名詞詞組時.如：
The guests spoke highly of the children and their performances that they saw at the Children’s Palace.
She described in her compositions the people and places that impressed her most.
⑦當主句是以 which 開頭的特殊疑問句時.如：Which is the car that killed the boy?