1. We could not have succeeded without my father's money

=>  If it hadn't been for my father's money, we could not have succeeded

2. Mark may not be very well but he still manages to ejnoy life

=> Mark's poor health doesn't prevent him from enjoying life

3. The guest didn't tell us why he had behaved so strangely at the cenmory

=> The reason why he had behaved so strangely at the ceremony was unknown

4. Keeping calm is the secert of passing your driving test

=> As long as you keep calm, you will pass your driving test 

5. We left quietly so that we wouldn't disturb the children.

=> So as not to disturb the children, we left quietly

6. The robber wore dark glasses so that no one would recognze him

=> The robber avoided being recognized by wearing dark glasses