Dưới đây là các câu được viết lại sử dụng câu điều kiện:

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. I can't play football this afternoon because I felt tired.
=> If I hadn't felt tired, I could have played football this afternoon.

3. She can't be employed because she doesn't have a college degree.
=> If she had a college degree, she could be employed.

4. We put off our trip because the weather was terrible.
=> If the weather hadn't been terrible, we wouldn't have put off our trip.

5. She is lazy so she can't pass the exam.
=> If she weren't lazy, she could pass the exam.

6. He smokes too much; that's why he can't get rid of his cough.
=> If he didn't smoke so much, he could get rid of his cough.

7. She walked to the meeting. She was late.
=> If she hadn't walked to the meeting, she wouldn't have been late.

8. I didn't eat lunch; I feel hungry now.
=> If I had eaten lunch, I wouldn't feel hungry now.

9. Don't tell lies to your boss or you'll be fired at once.
=> If you tell lies to your boss, you will be fired at once.