8. Your parents are happy because you behave yourself well. → If 9. They provided food then cleared up the debris. → After . 10. I don’t have free time , so I can’t go some where. → If I 11.I don’t know the answer, so I can’t tell you. → If 12. They will do the test well. They will review them all hard. → If 13. The rescue workers evacuated the villagers in the raged flood to the safe place last night. → The villagers in the raged flood 14. The students will provide aids for the homeless people tomorrow. → Aids 15. The people will protect the environment now. The environment will be nicer. → If 16 They don’t have a map, so they got lost → If 17. The storm destroyed many houses in this village last week. → Many houses 18 Someone has stolen by bicycle. → My bicycle 19. If he doesn’t work hard, he will not pass his exam. → Unless

8.If you didn't behave yourself well, your parents wouldn't be happy

9.After they had provided food, they cleared up the debris

10.If i had free time ,i would go to see film

11.If i knew the answer, i could tell you

12.If they review them all hard,They will do the test well

13.The village in the raged flood were evacuated the rescue workers to the safe place last night

14.Aids will be provided by the students for the homeless people tomorrow

15.If the people protect the environment, the environment would be nice

16.If they don't have a map, they will got lost

17.Many houses were destroyed by the storm in the village last week

18.My bicycle has been stolen

19.Unless he doesn't work hard, he will pass the exam.

8. Your parents are happy because you behave yourself well. 
→  If you didn't behave yourself well, your parents would be happy.
9. They provided food then cleared up the debris. 
→ After they had provided food, they cleared up the debris.
10. I don’t have free time , so I can’t go some where.
→ If I had free time, I would go to see him.
11.I don’t know the answer, so I can’t tell you.
→ If I knew the answer, I would tell you.
12. They will do the test well. They will review them all hard.
→ If they will review them all hard, they will do test well.
13. The rescue workers evacuated the villagers in the raged flood to the safe place last night.
→ The villagers in the raged flood were evacuated b the rescue workers to the safe place last night.
14. The students will provide aids for the homeless people tomorrow.
→ Aids will be provided by the students for the homeless people tomorrow.
15. The people will protect the environment now. The environment will be nicer.
→ If the people protect the environment, the environment would be nice.
16 They don’t have a map, so they got lost
→ If they don't have a map, they will got lost.
17. The storm destroyed many houses in this village last week.
→ Many houses were destroyed by the storm in the village last week.
18 Someone has stolen by bicycle.
→ My bicycle has been stolen.
19. If he doesn’t work hard, he will not pass his exam.
→ Unless he works hard, he will not pass his exam.