Выделяется 3 типа Conditional:

1 тип: часть с if употребляется в Present Simple, остальная часть - в Future Simple (употребляется, когда мы говорим о вероятных событиях в будущем и их результатам). Пример: If you study hard you will pass the exam (Если ты будешь учиться усердно, то сдашь экзамены)

2 тип: часть с if употребляется в Past Simple, остальная часть - с Would  и глаголом в первой форме (употребляется, когда мы говорим о невероятных или маловероятных событиях в настоящем и будущем). Пример: If I had more money I would buy a car (Если бы у меня было много денег, то я бы купил машину (но у меня нет много денег))

3 тип: часть с if употребляется в Past Perfect, остальная часть с Have been и глаголом в третьей форме (употребляется, когда действие уже совершенно в прошлом и ничего исправить нельзя). Пример: If he asked me I would have helped him (Если бы он попросил, то я бы ему помог (но он не попросил)).

1) If I had more money I would buy a car

2) I would set a party if I lived in a big house

3) If I knew the answer I would tell you

4) If I were rich I would travel around a lot

5) I would get a new profession if I were you

1) If she had studied for the test better she would have passed it

2) If he had asked me I would have helped him

3) I would have written you a letter if I had had your address

4) If you had listened carefully you wouldn't have made so many mistakes

5) If you hadn't left your car opened the robber wouldn't stolen it

1) If we had taken a taxi we wouldn't have been late

2) If I had vacation in summer I would get rest in Spain

3) She would find a new job if she had a desire.

4) If he won a lottery he would buy a new car

5) If she had worked hard she wouldn't have much time for watching TV