1/ The weather isn't fine. We can't go for a walk
-> If were fine, we would go for a walk
2/ my father doesn't have enough money , so he won't buy that car.
-> If my father had enough money, he would buy that car
3/ i haven't got free time. I can't write to her.
-> if I had got free time, I would have written to her
4/ hurry up or you will not catch the first train.
-> if you don't hurry, you won't catch the first train
5/ be calm and everything will be all right.
-> if you are calm, everything will be all right
6/ get out of my house or i call the police
-> if you don't get out of my house, I will call the police
7/ the browns aren't rich. They can't buy a new house.
-> if the browns were rich, they could buy a new house
8/ don't hope to be successful without trying you best
-> if you don' t try your best, you won't be successful