Ответ:

1 If she had studied,she would have passed the exam.

2 She wouldn't have arrived on time if she had taken the bus.

3 If you hadn't spoken English,she wouldn't have understood

4 He would have taken a taxi if he had had enough money.

5 She hadn't met him if she wouldn't have come to London.

6 If Bill had seen the house, he wouldn't have bought it