Rewrite: 1. Work hard and you will pass the exam. - If 2. Do your exercise carefully or you will make mistakes. -> If you 3. You practice your English regularly, or your English does not improve. -> If you 4. Practice your English regularly or your English will not improve. -> If

1. Work hard and you will pass the exam.

- If you work hard, you will pass the exam.

2. Do your exercise carefully or you will make mistakes.

-> If you do your exercise carefully, you won't make mistakes.

3. You practice your English regularly, or your English does not improve.

-> If you practice your English regularly, your English will improve.

4. Practice your English regularly or your English will not improve.

-> If ( Câu 4 giống câu 3 )