1. I (buy) a car if you lend me some money. 2. If the book (not be) expensive, I'll buy it. 3. You would be very surprised if he (return) . 4. I'll go out if it (not rain) . 5. They wouldn't come to the party if you (not invite) them 6. What you (do) if you (be) him? 7. If that hat costs much, I (buy) a small one. 8. If I (make) that mistake again, my teacher (get) angry with me. 9. If I spoke English, my job (be) a lot easier. 10. I will lend them some money if they (ask) .. me.