1.Put your back into something 拼命干某事,竭尽全力.
We will success,if we put our back into it!如果竭尽全力去做好它,我们将会成功!
2.Get off somebody’s back 不再妨碍、惹恼某人
Don't get off his back!He have been bored to death.不要去烦他了,他已经快烦死了!
3.Behind somebody’s back 背着某人
Don't talk about him behind his back.不要背后议论他!
4.Get somebody’s back up 使某人生气,惹恼某人
He get my back up!他让我很生气!