充当主语,宾语或表语;作主语时谓语动词用单数
Everything begins to grow when spring comes.
形容词修饰复合不定代词时要后置
There is nothing wrong with my car.
something somebody和someone通常用于肯定句
Would you like something to drink?
anything anybody和anyone通常用于否定句和一般疑问句
在疑问句中表示请求建议或希望得到对方肯定回答时,用something somebody或someone
Would you like something to drink?
在肯定句中,anybody anything用于hardly never seldom等具有否定意义的词后面
I can hardly see anything in the darkness.