I.
1. I will buy a car if you lend me some money.
2. If the book isn't expensive,l buy it.
3. I'll go out if it doesn't rain.
4. If that hat costs much, I will buy a small one.
5. If she makes that mistake again, her teacher will get angry with me.
6. I will lend them some money if they ask me.
7. My dog will bark if it hear any strange sound.
8. They will let you in if you come late.
9. He’s waiting for his mother to come back from Chicago. If his mother comes home, he will have a lot of presents.
10. The kitchen will look better if we have red curtains.
II.
1. Would you like if I closed the windows?
2. What would happen if I didn't do that?
3. He couldn’t understand if we didn't explain more.
4. If we didn’t visit her, she would be very sad.
5. We would be tired if we didn’t try to do that.
6. If I refused, he wouldn't be very disappointed.
7. I would be this job if I were out of work now.
8. You would be very upset if you would take it.
9. He would feel better if he exercised more.
10. I would tell the answer if I knew it.