viết lại câu sao cho nghĩ không thay đổi 
1.Unless you went to school on time, you would be punished ( if)
2. I can't buy it because it have no money ( if )
3. He is not here so he can't help me ( ìf )
4. Promise to try harder, or i won't help you ( if)
5. I'll take the job unless the pay is to slow (unless)
6. Run quickly or you may miss the train ( if you)
7. If i finished my homework, i can go out at the weekend ( unless)
8. The weather is bad, so we can't go for a picnic ( if)