例句：
1、The director worked on in the office until ten o'clock last night.
主任昨晚在辦公室工作到十點。
2、The nut has been worked on the spindle.
螺帽已經擰在軸心上了。
3、He has been working on a new novel for over a year now.
近一年多來，他一直在寫一部新小說。
4、In order to make him accept our suggestion, I decided to work on him immediately.
為了讓他接受我們的建議，我決定立刻對他做工作。