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2. If you don't study hard, you will fail your next exam. 
3. Unless it rains next Sunday, we will go to the beach.
4. Unless she gets up early, she will be late for work.
5. Unless it is beautiful tomorrow, we won't go out. 
6. If we study hard, we will pass the next exam. 
7. Unless we have money, we won't buy that car.  
8. Unless you work hark, you will fail the next exam.
9. Unless you study hard, you will fail the next exam.
10. If you aren't careful, you will not get a job.
11. Unless my mother is busy tonight, she will help me do my homework. 
12. If she has money, she will buy that car. 
13. If my mother is busy tonight, she won't help me do homework.
14. Unless you are careful, you will not get a job.
15. Unless your brother hurries, he will be late for school. 
16. If you save money, you will buy a new house. 
17. If she doesn't study hard, she will fail the exam.
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Câu điều kiện loại 1: có thể xảy ra ở tương lai
If + S + V (HTĐ), S + will/can/should/... + V
Unless = If not: Nếu...không, trừ khi