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.
5. Unless you rest yourself, you really will be ill.
1. Unless you study harder, you 'll get bad marks.
2. If this man is not a driver, he can’t help you move by car.
3. Unless he practices writing every day, he can't improve his writing skill.
6. Unless you are absent from school, you will not write a sick-note.
Rewrite the following sentences that keep the same meaning.(If=>Unless)
5. If you don’t rest yourself you really will be ill.
=> Unless …………… you rest yourself, you really will be ill………………..……………………
1.If you don't study harder, you 'll get bad marks.
=> Unless ........................ you study harder, you 'll get bad marks. ..................................................
2.Unless this man is a driver, he can’t help you move by car.
=>If................................................ this man is not a driver, he can’t help you move by car..................................................................................
3. If he doesn't practice writing every day, he can't improve his writing skill.
=> Unless ...................... you are absent from school, you will not write a sick-note.....................................................
6. If you are absent from school, you have to write a sick-note.
Unless you are absent from school, you don't have to write a sick-note.