介绍:
一：复合不定代词做主语，谓语动词用单数
Everybody likes math.
二：形容词修饰复合不定代词，放在不定代词后面。
He has something interesting to say
三：一般情况下，some 构成的复合不定代词其作用和some相同，用于肯定句；any构成的复合不定代词表示否定含义，用于否定句。
1. I have something to tell you.
2.He didn't say anything at the meeting yesterday
=He said nothing at the meeting yesterday.
四：something 可用于提建议或请求的问句中，以及期望得到说话对方做出肯定回答的问句中。
would you like something to eat ?
五：anthing 和anybody/anyone 可用于陈述句表示任何东西，一个人。
Anything is possible.
Anyone can sit here
大家还在听
