不定代词：代替或修饰不特指的人或事物的代词叫不定代词。
(5)either和neither的用法：
either意思是“两个中间的任何一个”；neither是either的否定形式,意思是“两个都不”。
neither和either在句子中可作主语、宾语和定语等,都用作单数。
如：I don’t care much for what to drink. Either of the two will do. (我不介意喝些什么,两个之中随便哪个都行)
--Will you go there by bus or by car? –Neither. I will go there by train.(你坐公车去还是坐轿车去？一个都不坐,我坐火车去。)
(6)other、the other和another的用法：
other意思是“另一”、“另一些”,有复数形式。在句子中可作主语、宾语和定语。another意思是“另外”、“又一个”,表示增加,在句中可作宾语和定语。
如：Some girls are singing under the big apple tree and others are sitting on the grass talking.(有些女孩在大苹果树下唱歌,别的就躺在草地上说话)
You have had several cakes. Do you really want another one?(你已经吃了好几块饼子了,你真的还要一块？)
I want another four books.(我还要四本书)
another(另外的,再一,又一)与the other(另外的一个) 主要从数量上区分,只有两个时用the other,在原先基础上增加用another。
如：This is one of your socks. Where is the other one?(这是你的一只袜子,还有一只呢？)
I have eaten 4 cakes, but I still want another.(我已经吃了4块蛋糕,但是我还要以块。)
others与the others的主要区别：
others指“剩余的人/物”(指大部分)；the others指“其余的人/物”,(指全部)。
如：
A few students are playing soccer while others are watching them.(有几个学生在踢足球,其他一些人在观看)
Two of the ten boys are standing and the others are sitting round them.(十个男孩中有两个站着,其他人都围着他们坐着。)
(7)many和much的用法：
many意思是“很多”,与可数名词复数连用；much意思是“很多”,与不可数名词连用。它们在句中可作主语、宾语和定语等。
如：I don’t have many friends here.(在这里我没有很多的朋友。)
Many died in the bus accident.(许多人在公交车祸中丧失)
We can learn much with the help of him.(在他的帮助之下我们能学到很多)
many和much一般用于否定句,肯定句中通常用a lot of 或者lots of; many / much用于肯定句时可以在前面加上so、very或too.
如：There are a lot of people on the playground.(操场上有许多的人)
They haven’t got much work to do.(他们没有多少事情可做)
There are too many people in the room.(房间里人太多了。)
(8)few、little、a few、a little的用法：
few、little意思是“很少几个”、“几乎没有”,有否定的意思,
a few、a little意思是“有几个”、“有些”,有肯定的意思 ；
few、a few与可数名词连用或代替可数的事物,
little、a little与不可数名词连用或代替不可数的事物。它们在句中可作主语、宾语和定语
如：He is very poor and he has little money.(他很穷,几乎没有什么钱。)
Don’t worry. There is still a little time left.(别着急,还有一点儿时间呢。)
In that polar region there live few people.(在那个极地地区几乎不住人)
You can get a few sweets from him.(你可以从他那儿弄到一些糖果)
