和不可数、单数和复数之分。常见的不定代词有all, both, each, every等，以及含有some­， any­，no­等的复合不定代词，如anybody，something, none。不定代词在句中作主语、定语、宾语和表语。

　　"Where there is a will, there is a way" is an old proverb which almost everyone knows, but not all understand it so well. (2014·山东高考满分作文)

　　"有志者事竟成"这句古老的谚语几乎人人皆知，但并不是所有的人都对它理解的很透彻。

　　I badly need someone to help me with my oral English, at which lots of Chinese students are bad. (2015·四川高考书面表达)

　　我急需要有人来帮助我学习英语口语，英语口语是许多中国学生很不擅长的。

　　A smile costs nothing, but gives much. (2014·重庆高考写作一)

　　微笑什么都不会花费，但却带来很多。

　　I asked all the children and each told a different story.

　　我问过所有的孩子，每个人的说法都不一样。

　　2．复合不定代词作主语时谓语动词用单数，都不能接of短语；但分开写的some one, any one, every one可与of连用。no one不与of连用，但none可与of连用。

　　I argue that every one of us should try our best to help those in need. (2014·重庆高考写作一)

　　我认为我们每个人都应竭尽全力去帮助那些需要帮助的人。

　　None of us has/have been to Beijing so far.

　　到目前为止，我们中没有一个人去过北京。

　　No one expects you to be perfect, but we do expect you always to do your best.

　　没人指望你完美无缺，但我确实希望你尽力而为。

　　二、几组常见不定代词的区别

　　1．many, much, few, a few, little, a little

　　意义

区别　　 许多 有点/些(表示肯定) 几乎没有(表示否定) 可数 many a few few 不可数 much a little little 　　My math used to be poor and I failed many times in the exam. (2014·福建高考书面表达)

　　我的数学曾经很差，我在考试中失败过很多次。

　　There has been much gossip in commercial circles as to his resignation.

　　关于他的辞职，在商界一直有很多流言蜚语。

A few days later, the problem was really solved. (2014·北京高考书面表达二)