mowa zależna i past perfect

Proszę o sprawdzenie tych zdań:
1. First she had cleaned the house and then she watched TV.
2. First the boys had finished their homework and then they went out to play.
3. I felt happier, because I had found a solution to the problem.
4. I was afraid of the test since I hadn't studied the night before.
5. When Mike came back home he discovered that someone had robed the house.
6. After he received the prize companies had offered him a job.
MOWA ZALEŻNA
I'll go shopping tomorrow if I have time.
TO BĘDZIE TAK?
He said that he would go shopping the next day if he had time.

All of them are OK, but every time you say "first..." followed by "then..." and "firs... then...," the turn of events is clear and the perfect tense is pretty much an overkill.

To continue picking on you, I think you could also replace "since" in (4) by the good old-fashoned "because" and "next" in the last one by "following."

I've missed #6.
It isn't impossible, but it doesn't follow the patternthat you seem to be following.
I think you mean to say, "After he had received..., the company offered him...."
What I said before about after...,first..., then... still applies though.

Dziękuję