If I had known it was a secret, I wouldn't have told anyone.
If I were you, I would stop smoking.
If you put water in the freezer , it becomes ice.
If they play well, they will win the match.
If I earned more money, I would buy my parents a really big house!
Water boils if you heat it to 100 C.
We would have gone to the park if it hadn't rained.
If you invite Mike, I won't come with you.
If I had more time, I would take karate lesson.
If you don't water the plants, they die.