окончить условных предложений ( типа 1 2 3), поставив глагол в

Завершить условных предложений ( типа 1 2 3), поставив глагол в правильной форме
1) If they (have) ___________ time at the weekend they will come to see us.
2) if we sneak out quitly nobody (notice) _______.
3) if we (know) _______about your problem we would have helped you.
4) if i (be) ___________ you i would not buy that dress.
5) we (arrive) _______ earlier if we had not missed the bus.