something通常用于肯定句,anything通常用于否定句或疑問(wèn)句.
例如：
There is something in the box.（肯定句）
There isn’t anything in the box.(否定句)
Is there anything in the box?(疑問(wèn)句)
Nothing 在意義上等于 not anything.
例如：I know nothing about it.(=I don’t know anything about it ）我對(duì)此事一無(wú)所知.
everything :
1.一切事物；每樣事物：
This shop sells everything needed for camping.這家商店出售一切露營(yíng)用具.
Tell me everything about it.告訴我這件事情的始末.
2.最重要的事；
Money is everything to him.金錢(qián)對(duì)他比什么都重要.
She`s beautiful,I gree,but beauty is not everything.我同意她是美麗的,但美并不是最重要的.