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13. Max will pass the exam if he study hard.

14. If he is not at home, I will visit his sister then.

15. If she doesn't walk everyday, she will not be healthy enough.

16. If Max didn't accept Alex's invitation this time, Alex would not invite him again.

17. If my kid didn't read this book, he would not get a good mark in Literature.

18. If Tom didn't water the violets, they would die.

19. If Lena had not been happy, she wouldn't have stayed there for a long time.

20. If my son didn't make his bed, he would not play football with his friends.

21. If my teacher didn't like English, I had tried to study it harder than before.

22. My son will speak English fluently if he go to study English abroad.

23. If she falled in love with Henry, they would get married, I think.

24. If you help me, I will help you.

25. If they catch the bus, they will arrive on time.

26. If my parent supported me, I would be a better personal.

27. If it rains, I will get wet.

28. Sally and Elizabeth will go out tonight if their parents allow it.

29. They will visit Eiffel Tower if they go to France.