If the wind weren't blowing hard, I would take the boat out for a rice

If  I had known you were busy,I wouldn't have disturbed you

If it isn't rain, everyone can eat outside.

If you didn't live so far away, we would visit you often.

if Margaret had not been wearing a seat belt, she would have been hurt in the accident

If I didn’t have to work tomorrow evening, I could meet you.

if I knew something about plumbing, I could fix the leak in the sink myself.

if It had been quite valuable five years ago, we would have bought that picture then

I wouldn't feel better now if you hadn't talked to me about my problems yesterday.

If Carol had not been studying, she would have answered

 If she weren’t very thin, she would not feel cold so much.

 If he polished his shoes, he would look smart.

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.