12. You dont save electricity. You pay a lot of money.
->If you don't save electricity, you will pay a lot of money
13. We dont have enough money, so we dont buy those new comics.
->If we had enough money, we would buy those new comics
14. She is not free today, so she cant go to the movie with her friends.
-> If she were free today, she could go to the movie with her friends
15. He is so lazy. He fails the final exam.
->If he weren't lazy, he wouldn't fail the final exam
16. The weather is not fine. The children dont play outdoors.
->If the weather were fine, the children would play outdoors
17. Thu cannot swim, so she doesnt go to the swimming pool with her friends.
-> If Thu could swim, she woudl go to the swimming pool with her firiends
18. People dont see the UFO, so they dont call the National UFO Reporting Centre.
-> If people saw the UFO, they would call the National UFO Reporting Centre
19. She doesnt keep the refrigerator door closed, so she cannot save the energy.
->If she kept the refrigerator door closed, she could save the money
20. There is much traffic, so the air is polluted by the waste smoke.
->If there weren't much traffic, the aire wouldn't be polluted by the waste smoke
21. Ba isnt fast enough to catch the school bus.
->If Ba were fast enough, he would catch the school bus