分析work on

work on: 表示“从事”、“创作”、“进行”，后面接名词、代词或V－ing，强调做具体的事；还可表示“继续工作”、“努力说服”，既可作及物动词短语用，又可作不及物动词短语用。
Miss Liu is working on a new book.
刘老师正在写一部新书。
We'll work on till midnight
我们将继续工作到午夜。

work on

1. 继续工作，不断工作：例句: The director worked on in the office until ten o'clock last night.
主任昨晚在办公室工作到十点。2. 把(螺帽等)拧上,旋进[亦作 work into, work onto]：例句: The nut has been worked on the spindle.
螺帽已经拧在轴心上了。3. 致力于，从事于：例句: The scientists are still working on inventing new methods of reaching outer space.
科学家们仍致力于发明到达外层空间的新方法。4. 使人信服，说服[亦作 work upon]：例句: In order to make him accept our suggestion, I decided to work on him immediately.
为了让他接受我们的建议，我决定立刻对他做工作。5. 对…发生影响，对…起作用[亦作 work upon]：例句: The doctor told him that this kind of medicine may work on him.
医生对他说这种药对他可能有效。6. 在…上雕刻；在…上绣制：例句: She worked a dragon on the new linen cloth.
她在新的亚麻布上绣了条龙。

你老师是对的
work on 的解释楼上已经说得很详细了