1. He can’t go out because he has to study for his exam.
=> If he didn't have to study for his exam,he could go out.
2. She is lazy so she can’t pass the exam.
=>if she weren't lazy, she could pass the exam.
3. He smokes too much, that’s why he can’t get rid of his cough.
=>if he didn't smoke too much, he could get rid of his cough.
4. She is very shy, so she doesn’t enjoy the party.
=>if she weren't shy, she would enjoy the party.
5. He doesn’t take any exercises, so he is unhealthy.
=>if he took any exercises,he wouldn't be so unhealthy.
6.We can’t get the ticket because I don’t have the right change.
=>if I had the right change,we could get the ticket.
7.Study hard or you won’t pass the exam.
=>if you don't study hard, you won't pass the.
8.Be impatient or you will make mistakes.
=>if you are impatient , you will make mistakes(câu này bạn viết sai đề)
9.You should apologize for the misunderstanding to her.
=>if I were you, I would apologize to her for the misunderstanding.
10.Unless you change your mind, the company won't refund the money.
=>if you don't change your mind, the company will refund the money
11.Tom isn't in my place, so he doesn't understand.
=>if Tom were in my place, he would understand.
12.We can't go because it is raining.
=>If it were not rain, we could go.
13.Unless there is so much traffic, the air won't be polluted.
=>If there isn't so much traffic, the air won't be polluted.
14.If it doesn't rain, there will be a shortage of water.
=>Unless it rains, there will be a shortage of water.
15. Unless she starts at once, she will be late.
=>if she doesn't start at once, she will be late.