Ребята, очень безотлагательно, помогите сделать британский. очень необходимо. буду признательна!

1. John has not flown in a plane since he was ten.
2. Rachel hasn't seen any film stars since she arrived in Hollywood.
3. Since he bought a computer, Mark hasn't stopped playing computer games. 
4. Pam has wanted to be a vet since she read a book about one.
5. Julie has not spoken to Sam since they had an argument.
6. Since he started rollerblading, Tim has fallen over many times.