1 作主语时谓语动词要用第三人称单数,如：Something is wrong with his bike.
2 形容词修饰它时要放在它的后面,如：I have something important to tell you.
3 一般用于肯定句中,但也可用于征求意见并希望得到肯定回答的疑问句中,如：There is something wrong with it.
Would you like something to eat?