Из двух вариантов выберите один верный. If it rains/will rain, I will stay at home.

If I had a lot of money, I buy/I would buy a big house.

Jim would have entered the university if he had passed/has passed the exams.

If I were/would be you, I would tell him everything.

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Объяснение:

If it rains, I will stay at home. First conditional

If I had a lot of money, I would buy a big house. Second conditional

Jim would have entered the university if he had passed the exams. Third conditional

If I were you, I would tell him everything. Second conditional