24. If i knew the answer, i could tell you

25. If he did his homework, he would not be always punished

26. If it didn't snow heavily, the meeting couldn't be cancelled.

27. The English grammar has been explained by our teachers

28. The accident was caused by some drunk drivers

29. Their parents will be visited next month

30. This house and these cars are going to be painted by the Greens for chistmas day

31. The pollution problems have been discussed by the students since last week

32. Our teeth should be cleaned twice a day

33. Her report had been finished by soon

34. A special dinner is going to be made by Sam tonight

35. The work will be finished by the team by 5.00 p.m

36. The instructions for medical use ought to be read carefully

37. This flower is watered by my father every morning

38. This train ticket was ordered for Tim's mother

39. If our parents didn't live so far away, we would visit they very often

40. If i knew enough about the machine, i could mend it myself

41. If Peter didn't ignore Mary, she wouldn't get angry at him

42. If Luis weren't smart, he wouldn't find clever solutions to life's problems

43. The hotel should have been finished by the time you arrive

44. The history of the European Community has to be written one day

45. If he had prepared for the interview , he would have got the job.

nếu câu nào bạn không hiểu có thể hỏi mình 

1. if i knew the answer, i could tell you 

2. if he did his homework, he wouldn't be punished

3. if it snows heavily, the meeting can be cancelled

4. the english grammar has been explained

5. the accident was caused by some drunk drivers

6. their parents will be visited next month

7. this house and these cars are going to be painted by the greens for christmas

8. the pollution problems have been discused since last week

9. our teeth should be cleaned twice a day

10. her report had been reported by soon

11. a special dinner is going to be made by sam tonight

12. the work wil be finished by 5pm

13. the instruction for medical use ought to be read carefully

14. this flower is watered by my father everyday

15. this train ticket was ordered by tim for his mom

16. if our parents didn't live so far away, we would visit them very often

17. if i knew enough about the machine, i could mend it myself

18. if peter didn't ignore mary, she wouldn't angry at him

19. if luis were't smart, he could find ...

20. the hotel should have been finished by the time...

21. the history of... community has to be written one day 

22. if he had prepared for the interview, he could have got the job