1、我们先看一个题目了解名词性从句的简化
Don't worry.I will teach you_____
A. that you should do
B. what to
C. what to do it
D. that to do
2、N1 我们先来了解主语从句的简化
例句：
That I talk with my friends is my greatest enjoyment.
这里That引导主语从句，其中that可省略
省略后Talk要使用动名词形式
Talking with…………
3、N2 宾语从句简化、
例句：
Many people hate that they do the washing.
在这里that可省略
省略之后，do需要变动名词
Many people hate doing the washing.
4、N3 介词后宾语从句
例句：
I got used to that I worked late into the night.
在这里to是介词，that可省略
work在介词之后，需要改成动名词形式
5、N4 表语从句
例句：
Toby favourite pastetime is that he goes swiming on weekend.
在这里，that可省略，从居主语可省略
go需要使用动名词
