Put the verbs in brackets into the correct tense. 1) I will help you with the shopping later if i (have) time. 2) Unless you (leave) now, you`ll miss the train. 3) If i were you, I (not/buy) a second-hand car. 4) If only it (stop) snowing, we could go outside. 5) Paul had a car accident yesterday. He wishes he (be) more careful. 6) If William (pay) the electricity bill, it wouldn`t have been cut off. 7) Sarah wishes she (not/have to) work so hard every day. 8) I wish you (not/make) a mess in the kitchen every time you cook something.