When it rains, we (to stay) at home. If you passed the exam, you (to get) a diploma with honors. If you had bought the

When it rains, we stay at home. — Когда идет дождь, мы остаемся дома.

If you passed the exam, you would get a diploma with honors. — Если бы вы сдали экзамен, вы получили бы диплом с отличием.

If you had bought the butter yesterday, we should have cooked the cake. — Если бы вы вчера купили масло, мы бы приготовили торт.