1. If I knew the result now, I would phone her immediately.
2. If I were you, I would stay at home.
3. If you had not missed the train, you would have arrived in time.
4. If they had known it before, they would have taken measures.
5. Your brother would become much stronger if he took cold baths regularly.
6. If he were a first-class sportsman now, he had not been training enough last year. Здесь они намудрили. Условие не может быть в настоящем, а следствие в прошедшем. Время не идёт в обратном направлении.
7. If I had written the composition yesterday, I would be free now. Mixed conditional, а не 2 или 3 типа.