If you study, you will pass the exam.
If it rains, we will cancel the trip.
If you stay here, you will lost the bus.
(first conditional)
If they sold their house, they would be rich.
If I won the lottery, I would travel a lot.
If losted my keys, I would stay in your house.
(second conditional)
If I hadn't been sick, I would have gone to your party.
If you had studied, you would have passed the exam.
If you had played, you would have losted the time.
(third conditional)
