1. The wind is blowing hard, so I won’t take the boat out for ride.
=> If the wind were not blowing hard, I wouldn’t take the boat out for ride.
2. I’m sorry I disturbed you. I didn’t know you were busy.
=> If I had known you were busy, I wouldn't have disturbed you.
3. It might rain. If it does, everyone can eat inside.
=> If it rains, everyone can eat inside.
4. We don’t visit you very often because you live so far away.
=> If you did not live so far away, we would visit very often.
5. Margaret wasn’t injured in the crash because she was wearing a seat belt.
=> If Margaret hadn't been wearing a seat belt, she would have been injured in the crash.
6. I have to work tomorrow evening, so I can’t meet you.
=> If I didn't have to work tomorrow evening, I could meet you.
7. I don’t know anything about plumbing, so I didn’t fix the leak in the sink myself.
=> If I knew something about plumbing, I would fix the leak in the sink myself.
8. Is Matthew going to enter the race ? He’ll probably win it.
=> If Matthew enters the race, he’ll probably win it.
9. We should have bought that picture five years ago because it would be quite valuable now.
=> If that picture had been quite valuable five years ago, we would have bought it.
10. I feel better now because you talked to me about my problems last night.
=> If you hadn't talked to me about my problems yesterday, I wouldn't feel better now.
11. Carol didn’t answer the phone because she was studying.
=> If Carol had not been studying, she would have answered the phone.
12. She’s very thin, perhaps that’s why she feels cold so much.
=> If she weren’t very thin, she would not feel cold so much.
13. He never polishes his shoes, so he never looks smart.
=> If he polished his shoes, he would look smart.