1.work on 继续工作；从事于，致力于；对……有影响，对……有作用
例句：Work on the project is going on day and night.
工程正在夜以继日地进行。
2.work out 想出，制订出；解决，确定；计算出，理解，试验，考验；锻炼，训练
例句：It took me some time to work out what was causing this
我花了一些时间才弄清此事的起因。
3.worn out 不能再用的，破旧的；疲意不琪的，精疲力竭的
例句：The shoes were worn out of shape.
把鞋穿走形了。
4.worn to a shadow 极其虚弱，疲乏无力
例句：The illness has worn him down to a mere shadow of his former self.
他被这场病磨得不成样子。
5.worry about 担心,发愁
例句：You don't have to worry about me. I'm a good swimmer
你不用担心我。我水性很好。
6.would rather (或sooner) 宁愿，宁可
例句：Kids would rather play than study
孩子们宁愿玩也不愿学习。