Onun üzerinde çalışmak zorunda kalacağız.
- We'll have to work on that.
Ben bir deneme üzerinde çalışmak zorunda kaldım.
- I had to work on an essay.
John's in the studio working on the plans for the new house.
Leave it to me. I'll try to work on the boss to give us the day off.
... So for the last couple of years we've been working on ...
... been working on to integrate Google Play games services ...