work on, work at

• miss liu is working on a new book.
  劉老師正在寫一部新書。
• we'll work on till midnight
  我們將繼續(xù)工作到午夜。

• mr.zhang is working at a new invention.
  張先生正從事于一項新的發(fā)明。
• he has worked at this subject for many years.
  他研究這門學科已經好多年了。

動詞 work at:

1. to exert effort in order to do, make, or perform something
   同義詞：work on

1. Why don't you lay that problem aside for a while and work at it later?
   你為什么不先把問題放在一邊過會兒再說?
2. Tom's work at school is above the average.
   湯姆的功課是中上。
3. The boy does his work at a snail's pace.
   小男孩慢吞吞地做作業(yè)。
4. There is a growing tendency for people to work at home instead of in offices.
   人們在家里而不是在辦公室里工作的趨勢日益增長。
5. He has worked at physics/the topic for many years.
   他從事于物理研究／這一課題許多年了。
6. We have finished work at midday.
   我們已于正午完成任務。
7. If you had worked at French harder last year, you could speak it now.
   假如去年你用功學法語的話，今天你就能講法語了。
8. She is working at a new invention.
   她正從事一項新發(fā)明。