1）先行词是指物的 all, little, few, much, any, anything,
something，everything, nothing, none, the one 时。例如：
All that I can do has been done. 我能做的都已经做了。
He won’t tell you anything that he has heard about it.
他不会告诉你他所听到的有关它的任何情况。
先行词前有 all, little, few, much, any, every, no 等修饰时。例如：
There 1）先行词是指物的 all, little, few, much, any, anything,
something，everything, nothing, none, the one 时。例如：
All that I can do has been done. 我能做的都已经做了。
He won’t tell you anything that he has heard about it.
他不会告诉你他所听到的有关它的任何情况。
There is little work that is fit for you. 没什么工作适合你做。
I have eaten all the food that is left. 我把剩下的所有食物都吃了。
先行词作主句的表语时。例如：
It’s a book that will help you a lot. 这是一本对你有很大帮助的书。
It’s a sunny day that we are longing for. 这是我们所渴望的晴天。
4）先行词被 the only, the very，the last, the just, the same 等修饰时。例如：
You’ve the only person that I met here.
你是我在这儿遇见的唯一的一个人。
This is the very shirt that I am looking for.
这正是我一直在寻找的衬衫。
）引导词为从句的表语时。例如：
She’s not the girl that she used to be.
她不再是过去的她了。
6）先行词同时包括人和物时。例如：
We often talk about the people and the things that we are interested in.
我们常常谈论我们感兴趣的人和事。
3 、先行词是 there be 句型中的主语，且指人时。例如：
There is a stranger who wants to see you.
有个陌生人想要见你。
Once there was king who was very silly.
从前，有个非常愚蠢的国王