1. If I knew his phone number, I would call him.
2. If I had seen her at the party last Monday, I would have talked to her.
3. If she hadn't warned us, we would have gotten into trouble.
4. If he hadn't dropped out of school, his life would have been different.
5. If it had not rained so heavily, we would have finished the work last week.
6. If they had refused to help me, I would have failed.
7. If we weren't so busy, we could spend more time with you.