1. If you don't study hard, you won't pass the exam.
2. We will be late for class if we don't hurry.
3. If she doesn't get good marks, my sister won't study medicine.
4. The librarian will be happy if you return your library books on time.
1. If I don't get any homework, I will read a book tonight.
2. If the weather is good this weekend, I will go for a walk.
3. I will buy a new phone soon if I have enough money.
4. I will visit Spain if i ever have the chance to travel.
