everything, something, anything 均为指物的复合不定代词,它们作主语时,谓语动词常用单数形式.虽说构成出自一家,但它们的用法是有区别的：
everything 意为“每件事；一切事”,可用于肯定句、疑问句或否定句中.如:
① I hope everything goes well. 我希望一切顺利.
② Who can know everything? 谁能知道万事万物呢?
something意为“某事；某物”,常用于肯定句中,也可用于征求对方意见的疑问句中.如:
① Something is wrong with my ears. 我的耳朵有点毛病.
② Jim, could you do something for me, please? 吉姆,请为我做点事好吗?
anything 意为“某事；任何事”,一般用于否定句或疑问句中.如:
① Can you hear anything? 你能听到某种声音吗?
② You mustn't eat anything until you see the doctor. 在看医生之前不许吃任何东西.