1、名词当主词
Difficult problems used to take hours of work with pencil and paper. 以往困难的问题总是需要笔和纸工作数小时。
主词 Difficult problems
2、代名词当主词
I met him once, and that was in a theater. 我遇见他一次，那是在一家电影院里（that 指的是前面我遇见他一次的这件事情）。
主词 I that
Not both of them are bad. 并非他们两人都坏（只有一个坏）
主词 Not both of them
3、the+adj做主词
The poor are happy. 穷人是快乐的。
主词 the poor
4、不定词to+v做主词
To travel to Australia is my plan. 去澳洲旅行是我的计划
主词 To travel to Australia
5、动名词ving做主词
Smoking is not good for your health.吸烟对你的身体不好。
主词 smoking
6、名词片语做主词
How to learn English well troubles me. 如何把英语学好困扰这我。(名词片语是疑问词+to V 例如what to do/where to go, which to buy等）
主词 How to learn English well
7、名词子句做主词
What will be willbe. 要发生的总会发生。
主词 what will be
8、表距离的地方副词做主词
From Guangzhou to Melbourne takes 9 hours by air.从广州去墨尔本坐飞机要9个小时
主词 From Guangzhou to Melbourne
9、假主词
It is fun to study English. (to study English 是真主词）学习英语是有趣的。
主词 it
10、there
There are many students studying in the library.
11、which/what/who
which is yours?
what has happened to him?
who did such a terrible thing?
温馨提示：答案为网友推荐，仅供参考