1)I didn't know that Joe had to get up early, so didn't wake him up. If I knew he had to get up early, I'd wake him up.2) I was able to buy the car only because Jane lent me the money. If Jane didn't lend me the money, I wouldn't be able to buy the car.3) Karen wasn't injured in the crash because she was wearing a seat belt. If Karen didn't wear a seat belt, she would be injured in the crash.6) You didn't have any breakfast that's why you're hungry now. If you had some breakfast, you wouldn't be hungry.7)I didn't get a taxi because I didn't have any money. If had some money, I would get a taxi.