1.a) After/When Bob had eaten his meal, he paid the bill

b) Bob had eaten his meal before he paid the bill

2. a) After/ when Mary had read the contract, she signed it

b) Mary had read the contract before she signed it

3. a) After/When the boy had watched the mutch, he turned of the TV

b) The boy had watched the match before he turned off te he TV

4. a) After/When Peter had borrowed some money, he bought the car

b) Peter had borrowed some money before he bought a car