【名师点睛】

只用ｔｈａｔ引导定语从句的情况。

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。

２.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。

３.当先行词被the last , the very 和the only修饰时。例如：This is the very pen that I am looking for. 这正是我找的钢笔。

４..当先行词有序数词时。例如：You are the first person that I want to ask for.你是我要见的第一个人。

５..当先行词被all, every, no , some, few , little, much, both等修饰时，例如：This is all that I want to say at the meeting.这就是我在会上要说的。

６.当先行词既指人又指物时。例如：The professor and his achievement that I heard about are admired by them

７.当先行词为anything、everything、nothing时，关系代词用that,不用which；但用something时，用which或者that均可。例如：Everything we have seen in China is moving.　我们在中国看见的东西件件感人。