Exercise 01: Rewrite the sentence with “if/unless”. 1. Unless my sister is mistaken, she works for Nike. 2. Her friend is going to leave his job unless he gets a pay rise. 3. Unless she listens carefully, she won’t understand what we spoke. 4. If his sister doesn’t come over, he will listen to a good song. 5. If Jane finishes her work before 6 pm, she will dine out with her friends. 6. My brother won’t go travelling this summer if he doesn’t find a companion. 7. It is not easy to do these exercises unless you listen attentively to the teacher. 8. If Jim doesn’t submit his essay before Tuesday, he will be punished by the teacher. 9. Mai will be here tomorrow unless her flight is delayed. 10. Linda wouldn’t have called him if she hadn’t come back.  

1. If my sister isn't mistaken, she works for Nike.
2. Her friend is going to leave his job if he doesn't get a pay rise.
3. If she doesn't listen carefully, she won’t understand what we spoke.
4. Unless his sister comes over, he will listen to a good song.
5. Unless Jane finishes her work before 6 pm, she won't dine out with her friends.
6. My brother won't go travelling this summer unless he find a companion.
7. It is not easy to do these exercises if you don't listen attentively to the teacher.
8. Unless Jim submits his essay before Tuesday, he will be punished by the teacher.
9. Mai will be here tomorrow if her flight isn't delayed.
10. Linda wouldn’t have called him unless she had come back.