1. if I found her address, I would send her an invitation2. if I knew her name, I would have told you3. If I were in your place, I would have told my father4. if I were president, I would change the social security system5. if he had asked me yesterday, I would have given him a book6. if we came yesterday, we would kuili tickets. 7. if it started to rain, then you would have soaked8. if you went to bed early, I would not get tired