在前两次关于代词的分享中我们讲了人称代词、物主代词、反身代词、相互代词和指示代词的形式和用法。
今天，我们将对不定代词的用法进行学习和总结。喜欢的小伙伴们赶紧点亮文末的小爱心吧，记得留言和分享哦~
七、不定代词
(一) 定义
表示不定数量的人或物的代词叫不定代词。
(二) 常见的不定代词
英语中常见的不定代词有：some，any，both，none，either，neither，all，one，each，many，much，another，other，more，most，few，little等。
另外还有由some，any，no，every构成的复合不定代词。
(三) 不定代词的性、数和句法功能
不定代词具有名词和形容词的性质，并有可数和不可数之分，在句中可作主语、表语、宾语、同位语、状语、定语等。
Someone has let the news out. 有人把这消息泄漏出去。(主语)
This book is much too difficult for a child．这本书对一个小孩来说太难了。(表语)
I know nothing about this person．我对这个人一无所知。(宾语)
They each signed the paper. 他们每个人都在文件上签了字。(同位语)
I can't find my book anywhere．我在任何地方都不能找到我的书。(状语)
There is a little water in the glass．玻璃杯里有一些水。(定语)
(四) 常见不定代词辨析
Group 1: some & any
【A. 一般用法】
1. some、any可与单、复数名词及不可数名词连用。
2. some一般用于肯定句，any多用于疑问、否定或条件句。
He has some Chinese paintings.
Some like sports, sme like music.
Ask me if you have any question.
Do you have any questions to ask me?
I don't know any of the students.
【B. 特殊用法】
1. any用于肯定句，表示“任何”的意思。
You can take any of them. 你可以拿走其中任何一个。(宾语)
Any child can do that. 任何孩子都会做那事。(定语)
2. some用于单数可数名词前，表示“某一”的意思。
White went to some place in England. 怀特到英国某地去了。(定语)
3. 在期望对方回答Yes时，some可用于表示请求或邀请的问句中。
Would you like some coffee? 要喝点咖啡吗？(邀请)
"Dad, could you give me some money?" “爸爸，能给我一些钱吗？” (请求)
4. some用于否定句时，表示部分否定。
I don't know some of the students.
这些学生中我有些不认识。(宾语)
Group 2: one, both & all
1. one用作定语、表语、主语或宾语，可以指人或物，表示“一个”的意思，其复数为ones；指人时，其所有格为one's，反身代词为oneself。
One should try one's best to serve the people. (主语、定语)
This is not the one I want. (表语)
— How many English books do you have?
— I have only one. (宾语)
注：one、ones可以代替上文提到过的名词，以免重复，one、ones前面分别可以用this、that、these、those 或 the、which等词修饰。
These stories are more interesting than those ones.
Here are three pencils. Which one is yours, this one or that one or the one in the pencil-box?
2. both 用作定语、宾语、主语或同位语，可以指人或物，表示“两者都”的意思。
This maths problem can be worked out in both ways. (定语)
Both of the boys are here. (主语)
They both are teachers. (同位语)
注1：both 用于否定句，表示部分否定；表示完全否定时，用neither。
Both of us are not teachers. 我们俩并不都是老师。
Neither of us is a teacher. 我们俩都不是老师。
注2：both 不能放在the、these、those、my等词之后，而应放在它们的前面。
Both my parents like movies.
Both these boys are tall.
3. all 指“全部的”、“整个的”。通常与不可数名词连用，除少数情况外，一般不与单数可数名词连用，与复数名词连用时，表示“全部的”、“所有的”，表示三个或三个以上的人或物，在句中作主语、表语、宾语、定语、同位语。
He gave me all the money. (定语，修饰不可数名词)
The whole (不用 all) class was invited to the reunion.
All the schools were flooded. (定语，修饰复数可数名词)
I told him all about it. (宾语)
All of us were surprised at the news. (主语)
That's all for today. (表语)
They all have been to Beijing. (同位语)
注：all 用于否定句，表示部分否定，完全否定用none。
Not all the ants go out for food.
= All the ants don't go out for food.
并不是所有的蚂蚁都出去找食物。
None of the students are here.
没有一个学生在场。
None of the money is mine.
这钱没一个是我的。
Group 3: many & much
many 和 much 都表示“许多”，但many 修饰或代替复数可数名词，much 修饰或代替不可数可数名词。在句中作主语、宾语、定语。
Many of the students work hard at their lessons. (主语)
There is not much water here. (定语)
He said he had much to do. (宾语)
— How many toys do you have? (定语)
— I don't have many. (宾语)
Group 4: little & a little, few & a few
1. little、few 表示“很少、很少几个”，含否定意义。a little、a few表示“有些、有几个”，含肯定意义。
2. little、a little修饰或代替不可数名词，few、a few修饰或代替可数名词，它们可在句中作主语、宾语、定语。
Little has been done to prevent the air from being polluted. 没有采取什么措施来防止空气污染。(主语)
A little has been done to prevent the air from being polluted. 采取了一些措施来防止空气污染。(主语)
We know little about that country. 关于那个国家我们知道得很少。(宾语)
We know a little about that country. 关于那个国家我们只知道一些。(宾语)
There are few English magazines in the reading room. 阅览室里没几本英语杂志。(定语)
There are a few English magazines in the reading room. 阅览室里有几本英语杂志。(定语)
Few of them know French. 他们中没几个会法语。(主语)
A few of them know French. 他们中没几个会法语。(主语)
