Keep your chin up.别灰心

I's no big deal没什么大不了的

You must be a brain.你真是个天才

Say when:够了就告诉我Eg:A:Would you like some more tea? B: yes,please,A：say when B:When,thank you.

Every why has its wherefore:事出有因

Where there's smoke there's fire.无风不起浪

Confidence in yourself is the first step in the road to success:自信是踏上成功之路的第一步

Time softens all griefs.时间缓解一切伤痛

You have the advantage of me :你比我强（委婉表示你认识我，但我并不认识你）

Get out of  my face!离远一点，别烦我！

Get out of here！别骗了，别开玩笑了

I'm just browsing:我只是随便逛逛。

I'll say /You said it:我也有同感

Bad news travels fast.好事不出门，坏事传千里

Teaching is learning.:教学相长

You are too much:你太过分了

Don't give the greenlight to your children ,It's harmful to them.:不要纵容你的孩子，这样对他们是有害的。

On hearing the news, he was green with anger:他一听到这个消息，就气得脸色发青

She always keeps her memory green about the people and things in the school.:他总是对学校里的人或事记忆犹

新

Call it a day:停止工作A: it's late and you've acomplished a lot ,why don't you it a day?

                                   B:well,I call it a day at once.

Don't get smart with me.少在我面前耍花招

couch potato:very lazy person