3. if i weren't so busy, i would be able go out with you.
4. if people in this city saved the energy, they wouldn't suffer from the shortage of energy and air pollution.
5. if it weren't raining, we could go out
6. if she hadn't to work, she would watch this film
7. if Nam got high marks in the exam, he wouldn't be sad.
8. if they didn't take a taxi, they wouldn't arrive on time.
9. if she didn't do exercise every morning, she wouldn't look healthy
10. if that restaurant weren't very expensive, they would eat in it.
11. if Nga's parents lived near the city, she would see them very often
12, if we had a lot of money, we would buy a lot of new books.