Ответ:

1) 1. to attack, to assault, fly at

2. conflict

3. to blame

4. to obey

2) 1. If I had closed the window, the cat would not have jumped out.

2. Sandra wil join us later unless she has a lot of work to do.

3. They would have helped us move house if we had asked them.

4. If I were you, I would not drive in the snow.

5. John may win if he takes part in the contest.

6. If I had known him last year, I would have talked to him then.