1. If I her telephone number, I would have called her. (Correct)(Incorrect)
If I had known her telephone number, I would have called her. (Correct)
2. If he harder, he would have passed his exams. (Correct)(Incorrect)
If he had studied harder, he would have passed his exams. (Correct)
3. If he us, we wouldn't have finished our work so quickly. (Correct)(Incorrect)
If he hadn't helped us, we wouldn't have finished our work so quickly. (Correct)
4. If I enough money, I could have stayed at a five-star hotel during my vacation. (Correct)(Incorrect)
If I had had enough money, I could have stayed at a five-star hotel during my vacation. (Correct)
9. If you had asked him, he able to help you. (Correct)(Incorrect)
If you had asked him, he would have been able to help you. (Correct)
5. They for a picnic yesterday if the weather had been warmer. (Correct)(Incorrect)
They would have gone for a picnic yesterday if the weather had been warmer. (Correct)
6. It if he had been more attentive. (Correct)(Incorrect)
It wouldn't have happened if he had been more attentive. (Correct)
7. If he hadn't been so busy at work last week, he more time with his children. (Correct)(Incorrect)
If he hadn't been so busy at work last week, he could have spent more time with his children. (Correct)
8. We were terribly late. If we had taken a taxi instead of a bus, we on time. (Correct)(Incorrect)
We were terribly late. If we had taken a taxi instead of a bus, we might have arrived on time. (Correct)
10. I known his true intentions, I would not have allowed him to stay in my house. (Correct)(Incorrect)
Had I known his true intentions, I would not have allowed him to stay in my house. (Correct)