为什么"lie"后要加“s"

you should not lie to your parents lie要加s吗为什么 Women lie about their age, men lie about their income为什么不加s. lie on one‘s lie about one‘s Lie Lie Lie [Live From Myspace'S The List] 歌词 lie on one's back~ lie on one's back lie on one‘s stomach That`s a damn lie. believe 中为什么有着lie You should lie down.可不可以是You should lie.为什么 lie