giúp mk vs If I (know)………… that you were ill, I (go)……………to see you. If she`d had enough money, She (buy) …………… a car. I (buy) ……………… a car If you lend me some money. I (see) …………… him if I (go) …………to the party last night. We could have gone out if the weather (not be)………… so bad. If the book (not be )………… expensive, I`ll buy it. You would be very surprised if he (return)………… I`ll go out if it (not rain)………. They wouldn`t come to the party if you (not invite) …………..them What ………… you (do) …… if you (be) ………….. him? If that hat costs much, I (buy) ………. a small one. If you (drive) …….more carefully, you (have) ……… so many accidents. If I (make) ………that mistake again, my teacher (get) ……… angry with me.