1. If you see Peter, tell him he should be here at 8.00
->Should you see Peter, tell him he should be here at 8.00.
2.I wouldn't accept if you asked me to marry you!
->If you were to ask me to marry you, I wouldn't accept.
3. If you do the shopping, I'll cook lunch
-> You cook lunch, i will do the shopping.
4. What would you do if you found some buried treasure?
-> If you were i, what would you do if you found some buried treasure?