II. 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, our crops would be better. 6. The crops would have been ruined if 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.

II. Use UNLESS instead of IF.

1. If you are not careful, you will cut yourself with that knife.

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

2. If you do not like this one, I’ll bring you another.

-> Unless you 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.

-> Unless I have a quiet room, I’ll not be able to do any work.

4. If she does not hurry, she’ll be late.

-> Unless she hurries, she’ll be late. 

5. If we had more rain, our crops would be better.

-> Unless we had more rain, our crops wouldn't be better. 

6. The crops would have been ruined if the flood had risen higher.

-> Unless the flood had risen higher, the crops wouldn't have been ruined.

7. If you had not sneezed, he wouldn’t have known that we were there.

-> Unless had sneezed, he wouldn’t have known that we were there. 

8. If she did her hair differently, she would look quite nice.

-> Unless she did her hair differently, she wouldn't look quite nice.

9. If John had played for our football team, we would not have lost the game. 

-> Unless John had played for our football team, we would have lost the game. 

10. If I won a big prize in a lottery, I’d give up my job.

-> Unless I won a big prize in a lottery, I wouldn't give up my job.