16.If you don't go right now,you will be late for the train.

17.If she weren't often absent from class, she could keep pace with her classmates.

18.If I had knew Alice's address,I could have written to her.

19.If it hadn't rained heavily,everyone could have gone out.

20.If I weren't busy last night,I would have watched TV.

21.If people saw the UFO,they would call the National UFO Reporting Center.

22.If Thu could swim,she would go swimming in Lam Son Swimming pool.

23.If he had been there on time,his flight wouldn't have been delayed.

24.If Lisa hadn't reported me,I wouldn't have been able to finish the project.

25.If you hadn't helped me,I wouldn't have overcome this problem.

26.If she hadn't seen the signal,she would have stopped her car.

27.If you didn't speak too fast,they would understand you.

28.If he had enough qualifications,he would apply for the job.

29.If he polished his shoes,he would look smart.

30.If you don't go right now,you will be late for the train.

16.if you don't go right now, you will be late for the rain

17.if she wasn't often absent from class, she could keep pace with her classmates

18.if i had known her address,i would have written to alice

19.if the rain hadn't been heavy,everybody could have gone outdoors

20.if i hadn't been busy,i would have watched tv last night

21.if people saw the ufo,they would call the national ufo reporting center

22.if thu could swim,she would go swimming in lam son swimming pool

23.if his flight hadn't been delayed, he could have been there on time

24.unless thanks to lisa's report, i wouldn't have been able to finish the project

25.if i had had  your help,i could have overcome the problem

26.if she had seen the signal,she would have stopped her car

27.if you didn't speak too fast,they would understand you

28.if he had enough qualifications,he would apply for the job

29.if he polished his shoes,he would look smart

30.if you don't go right now,you will be late for the train