4. If they won`t study/ doesn`t study/ don`t study harder, they won`t pass/ don`t pass/ doesn`t pass the exam.
5. If my friends will come/ comes/ come, I will be/ be/ am very happy.
6. If she will earn/ earn/ earns a lot of money, she will fly/ flies/ fly to New York.
don't study don't pass
come will be
will earn will fly
Объяснение: