I've learnt that we should use the present perfect or the past perfect with "since," as in:
I haven't been to England since I was a child.
And in the past:
I had worked there since I (had) left school.
My question is: in spite of this rule, are there cases where we can use simply the past simple? I am wondering about a sentence like this:
She had looked liked a boy since she (had) cut her hair.
For the second part, my grammar books explain that the simple past is possible (cut/had cut) but for the first part (had looked like a boy), I am under the impression that "she looked like a boy since she (had)cut her" is possible?