it was my uncle

[navi tasan]

Which are correct:

1-It was my uncle I was working for.
2-It was for my uncle I was working.
3-It was my uncle for whom I was working.

Gratefully,
Navi.

 

[5jj]

The first is fine; the second is very unnatural; the third is possible, but formal.

 

[Tdol]

2 would work better this way:
It was for my uncle that I was working.

Still, it's not that natural.