Both of you are right.

You may take either road.

Either you are mad, or I am.

(2)all 三者以上，或用作不可数：

All that can be done has been done.

部分否定：

Not all ants go out for food.=All ants don't go out for food.

=Some ants don't go out for food.

并不是所有的蚂蚁都出去找食物。

Both are not correct.

并不是两个都对。(有一个不对)

全部否定：

三者以上用none of...；两者用neither of...；none与of连用；no one可单独用。

-How many pens do you have？

-None.

(3)no = not any,"没有"；every,"每一个"，与all同义，只能做定

语；each与every不同，是把东西一个个考虑。

(4)some和any

some 用于肯定句,any用于否定、疑问和条件句中。但有些疑

问句表示请求、建议、邀请、预料或鼓励对方做出肯定答复时，

用some：

Would you like some beer？

Will you kindly give me some paper？

(5)many和much

主要用于疑问句和否定句，肯定句多用a lot of；many修饰可

数名词；much修饰不可数名词。

Do you have many friends there？

Do they take much interest in it？

much 用作副词修饰比较级，"......得多"：

I feel much better now.

(6)another,other,the other, the others, others

another(三个以上)"任何一个"，"另一个"：

I don't like this book. Please show me another (one).

We waited for her for another two weeks.

other"另外的"，"别的"，只能做定语：

There are other books on his subject.

the other(两者中)"另一个":one...,the other...指两者；

one...another...指三者以上

others(泛指)另外的人和物;the others其余全部：