1. If I had his address, I could lend him some money.
2. If he had been careful, he wouldn't have lost his money.
3. If she helped me, I would find the house.
4. If she did morning exercises, she wouldn't be sick.
5. If she had taken my advice, she wouldn't have failed in the exams.
6. If they had had a map, they wouldn't have lost the way.