Помогите, пожалуйста. Употребите глаголы в подходящей форме.If you (to turn) out

Помогите, пожалуйста.
Употребите глаголы в нужной форме.
If you (to turn) out the light, we will be in the dark. 2. If I (to know) her well, I would have spoken to her. 3. If you (to study) hard, you will easily pass your exam. 4. If I not (to have) to work today, I would go to the cinema with you. 5. I wish he (to be) with us now. 6. If he not (to waste) so much time in class, he would have made better progress. 7. She looked as if she (to be) afraid of something. 8. If the boy (to know) English better, he would read some English books in the original. 9. If he (to know) grammar better, he would not make any mistakes. 10. If you (to take) the noon train, you would get there about four oclock. 11. If Mary (to leave) right away, she would be there in an hour. 12. It is time we (to go) home.