1.come by 得到，获得，经过,访问, 看望，偶然遇见，碰上
例句：Come by one day and look at some of the other dogs.
有空来一趟，看看其他狗。
2.come clean 全盘招供,说实话
例句：I think you have to come clean.
我认为你必须讲明真相。
3.come down 流传下来，落泊，潦倒；下跌, 淸醒过来
例句：His son has just come down from Oxford.
他的儿子刚从牛津大学毕业。
4.come down with 得，染上，出（钱）
例句：How much did she come down with?
她出了多少钱?
5.come down (或 back) to earth 从幻想中回到现实
例句：The lovers are living in a kind of dreamworld;but one day they'll come down to earth.
这对情侣现在正生活在梦幻中，总有一天他们会回到现实中来。
6.come from 从…来,来自；生长于
例句：Ambient noise may come from any direction.
外界噪声可以来自任意方向。