Переведите предложения:You wouldnt have so much trouble with your car if

Переведите предложения:
You wouldnt have so much trouble with your car if you didnt let other people use it so often.
If he agreed to speak at the conference, wed all be very happy.
It would be very convenient for me if we could put off our appointment till next Thursday.
If I were him, Id think twice before giving a definite answer.
The roads so icy. Id be especially careful at the wheel if I were you.
I wouldnt be surprised if they didnt agree with us.
I shouldnt be surprised if he were late again.