不定代词是不指明代替任何特定名词或形容词的代词,英语中不定代词有：some(something,somebody,someone,somewhere),any(anything,anybody,anyone,anywhere), no(nothing,nobody,no one), every(everything,everybody,everyone,everywhere),all,each,both,much,many, (a)little,(a)few,other(s),another,none,one,either, neither等.
1.不定代词的作用
1)作主语,例：
Both(of us) are right.
(我们)两人都对.
Either(of the answers) is correct.
两个回答不论哪一个都对.
Neither(of the answers) is correct.
两个回答哪一个都不对.
Is everybody here?
大家都到了吗?
Nothing special happened yesterday.
昨天没有发生什么特殊的事情.
All is going well.
一切进行得很好.
2)作宾语,例：
There is room for all of us.
我们所有的人全坐得下.
He gave two to each(of them).
他给(他们)每人两个.
I like none of the books.
这些书我全不喜欢.
If you have any, give us some.
有的话,给我们一点.3)作表语,例：
That’s nothing.
没什么.
Is that all you want to know?
你想知道的就是这些吗?
Thanks, it’s too much for me.
谢谢,太多了.
I’m not somebody,I’m nobody.
我不是重要人物,我是个无名小卒.
That’s really something.
那真是一大收获.
4)作定语,例：
You may take either road.
两条路你走哪条都行.
Every room is clean and tidy.
每一个房间都很整洁.
Everybody’s business is nobody’s business.人人都管等于没人管.(谚)
Where are the other students?
其他的学生在哪里?
Please give another example to illustrate your point.请再举个例子来说明你的论点.