Choose the sentence that has the same meaning as the first.
24. If you are not careful, you will cut yourself with that knife.
A. Unless you are careful, you will cut yourself with that knife.
B. If you are careful, you will cut yourself with that knife.
C. Unless you are not careful, you will cut yourself with that knife.
D. Unless you were careful, you will cut yourself with that knife.
25. Because he doesn’t leave immediately, I call a policeman.
A. Unless he leaves immediately, I won’t call a policeman.
B. If he leaves immediately, I won’t call a policeman.
C. Unless he leaves immediately, I will call a policeman.
D. If he left immediately, I wouldn’t call a policeman.
26. Today isn’t Sunday, so the pupils can’t go swimming.
A. If today is Sunday, the pupils could go swimming.
B. If today were Sunday, the pupils could go swimming.
C. The pupils could go swimming unless today is Sunday.
D. The pupils could not go swimming if today isn’t Sunday.
27. Stop talking or you won’t understand the lesson.
A. If you don’t stop talking, you won’t understand the lesson.
B. If you don’t stop talking, you wouldn’t understand the lesson.
C. If you hadn’t stopped talking, you wouldn’t understand the lesson.
D. If you hadn’t stopped talking, you wouldn’t have understood the lesson.
28. If the homework is difficult, I will ask you for help.
A. Unless the homework is easy, I won’t ask you for help.
B. Unless the homework is difficult, I will ask you for help.
C. Unless the homework is easy, I will ask you for help.
D. Unless the homework isn’t difficult, I won’t ask you for help.
29. I’ll let you borrow the book but you must promise to return it next week.
A. If you promise to return the book, I let you borrow it.
B. If you promised to return the book, I’ll let you borrow it.
C. If you promise to return the book next week, I’ll let you borrow it.
D. If you promise to return the book next week, I won’t let you borrow it.
I. Use UNLESS instead of IF:
1. If you are not careful, you will cut yourself with that knife
- Unless...........you're 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. She'll be late if she does not hurry.
- Unless.........she hurries,she'll be late.........
4. If you doesn't sneeze, he won't know that we are there.
- Unless........you sneeze, he won't know that we are there..........
5. If she does her hair diffrently, she will look quite nice.
- Unless........she does her hair differently she will look quite nice........
II. Make conditional sentences according to the fact provided (type1)
1. Keep silent or you wake the baby
- ............................if you don't keep silent, you will wake the baby up..................................
2. Go right now or you'll be late for the train.
-...............................unless you go right now, you'll be late for the train........................
3. Practice speaking English regularly or you will not pass this entrance exam.
-...........................unless you practice speaking english regularly, you won't pass this entrance exam ........................