work at

work on, work at

这是两个与work有关的词组。
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 at: 表示“致力于”、“从事于”、“研究”、“学习”，后面接名词、代词或v－ing，强调把时间和精力等用在某一方面的事情上，侧重于说明所从事的工作性质。

• mr.zhang is working at a new invention.
  张先生正从事于一项新的发明。
• he has worked at this subject for many years.
  他研究这门学科已经好多年了。

动词 work at:

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

1. Why don't you lay that problem aside for a while and work at it later?
   你为什么不先把问题放在一边过会儿再说?
2. Tom's work at school is above the average.
   汤姆的功课是中上。
3. The boy does his work at a snail's pace.
   小男孩慢吞吞地做作业。
4. There is a growing tendency for people to work at home instead of in offices.
   人们在家里而不是在办公室里工作的趋势日益增长。
5. He has worked at physics/the topic for many years.
   他从事于物理研究／这一课题许多年了。
6. We have finished work at midday.
   我们已于正午完成任务。
7. If you had worked at French harder last year, you could speak it now.
   假如去年你用功学法语的话，今天你就能讲法语了。
8. She is working at a new invention.
   她正从事一项新发明。