If I had enough free time, I could help you now
If the coffee hadn’t been too hot, we could have drunk it.
If Mary had worn the raincoat, she wouldn't have got cold
Unless you study harder, you will get bad marks
If Alan hadn't lost our phone number, he would have phoned us
If Mr John hadn't begun smoking cigarettes, he wouldn't have got a bad cold
If Elizabeth hadn't started smoking cigarettes, she wouldn't have got a bad cold
If she hadn't been ill, she could have taken part in this activity
If he spoke clearly, they would understand him
If he had finished his homework, he wouldn't have been punished by the teacher