1. I’m not rich, so I don’t live in a big house.
=> If I were rich, I would live in a big house.
2. We don’t visit you very often because you live so far away.
=> If you didn't live so far away, we would visit you very often.
3. Sandra can’t take a photo because she hasn’t got her camera.
=> If Sandra had her camera, she could take a photo.
4. She buys a lot of clothes, so she has no money.
=>  If she didn't buy a lot of clother, she wouldn't have no money.
5. I have to work tomorrow evening, so I can’t meet you.
=> If I didn't have to work tomorrow everning, I could meet you.
6. It’s raining, so we can’t have lunch in the garden.
=> If it wasn't raining, we could have lunch in the garden.
7. I’m often tired in the morning because I go to bed late.
=> If I didn't go to bed late, I wouldn't often tired in the morning.
8. We haven’t got a calculator, so we can’t work this out quicker.
=> If we had a calculator, we could work this out quicker.
9. Nick can’t find the way because he hasn’t got a map.
=> If NIck had a map, he could find the way.
10. David has so many accidents because he’s so clumsy. 
=> If David weren't so clumsy, he wouldn't have so many accidents.
11. I don’t write to my friends because I’m so busy.
=> If I were not so busy, I would write to my friends.
12. Susan hasn’t got a watch, so she’s often late for work.
=> If Susan had a watch,she wouldn't be late for work.
13. He coughs a lot because he smokes forty cigarettes a day.
=> If he didn't smoke forty cigarettes a day, he wouldn't cough a lot. 
14. They don’t have a garden. They don’t grow vegetables.
=> If they had a garden, they would grow vegetables.
15. I don’t have a boat. I won’t sail around the world.
=> If I had a boat, I would sail around the word.
- HỌC TỐT-