1.check out 检验，结账离开
例句：I'm ready to check out now.
我准备好要结账。
2.check over 检查，核对
例句：You'd better check over the car to fix its break down
你最好把车仔细检查一遍，排除它的故障。
3.look over 检查，查看
例句：You might want to look over these dispatches.
你或许还要看一下这些文件。
4.check in 报到，记录
例句：By what time should I check in?
我该什么时间办理登机手续呢？
5.chase the rainbows 做白日梦
例句：He is chasing the rainbows.
他在做白日梦。
6.cheer up 使高兴，高兴起来
例句：Cheer up, I'm only trying to make you jealous.
别不高兴，我只不过想引你吃醋。