Use UNLESS instead of IF. 1. If you are not careful, you will cut yourself with that knife. 2. If you do not like this one, I'll bring you another. 3. I'll not be able to do any work if I do not have a quiet room. 4. If she does not hurry, she'll be late. 5. If we had more rain, out crops would be better. 6. The crops would be have been ruined in the flood had risen higher. 7. If you had not sneezed, he wouldn't have known that we were there. 8. If she did her hair differently, she would look quite nice. 9. If John had played for our football team, we would not have lost the game. 10. If I won a big prize in a lottery, I'd give up my job.

Phương pháp làm:
- Đọc và hiểu câu hỏi cung cấp một câu hoặc một đoạn văn với từ "if".
- Sử dụng từ "unless" để thay thế từ "if" trong câu ban đầu.
- Đặt từ "unless" vào câu một cách đúng ngữ cảnh và sắp xếp lại cấu trúc câu nếu cần thiết.

Câu trả lời:
1. Unless you are careful, you will cut yourself with that knife.
2. Unless you like this one, I'll bring you another.
3. I won't be able to do any work unless I have a quiet room.
4. Unless she hurries, she'll be late.
5. Our crops would be better unless we had more rain.
6. The crops would have been ruined in the flood unless it had risen higher.
7. Unless you had sneezed, he wouldn't have known that we were there.
8. Unless she does her hair differently, she would look quite nice.
9. We would not have lost the game unless John had played for our football team.
10. Unless I won a big prize in a lottery, I'd give up my job.

I won't be able to do any work unless I have a quiet room.

Unless you like this one, I'll bring you another.

Unless you are careful, you will cut yourself with that knife.