1. Come on.
表示加油：Come on! You are gonna to win!
表示快一点：Hey guys, come on.
表示不相信：Oh man. Come on. Seriously?
2. Coming right up.
表示点菜马上到。
A:Hey, can I have a glass of Jack and Coke?
B:Sure. Coming right up.
3. Come again?
表示请再说一遍。
I am sorry. Come again?
4. See something coming.
表示预料之中。
Yeah, I saw it coming.
5. Have/Had it coming.
表示自找的。
It is not my fault. You totally had it coming.