30. If we had had a map, we wouldn't have gotten lost

31. If it hadn't rained all time, he could have enjoyed his visit

32. If we hadn't been using an out of date timetable, we wouldn't have missed the train

33. If they spoke English to her, her English could improve

34. If I have much time, I can read more

35. Unless he read more, he won't....

36. If Nam speaks E well, he can translate this message

37. If you don't work hard, you won't pass the exam

38. If he hadn't been at the hospital last night, he could have replied my phone

39. If it hadn't rained, the crops...

40. If he hadn't helped me, I couldn't solve...

41. If I knew her phone number, I would ring her up

42. If you don't fo right, you will be late...

43. If it hadn't been very cold yesterday, we could have gone swimming

44. Unless you are calm, you will make a wrong decision

45. If he doesn't phone immediately, he...

46. If it hadn't rained, we could have gone 

47. If she remembered the doctor' advice, she wouldn't be ill

48. If he doesn't stop smoking, he will have a sore throat

49. If Martin hadn't failed his... week, he wouldn't have been very nervous

50. Unless you keep your feet dry, you will catch a cold

51. If you come late, thay won't let you in

52. If he learns his lessons carefully, he will pass the exam

53. If Mary hadn't eaten many ice- creams, she wouldn't have felt sick

30. if we had had a map, we 'd not have got lost. 

some suggestion for you:

31, 32,38 , 39, 40, 46, 49 : if 3

33, 34, 36, 37, 41,43, 47, 48, 52, 53 : if 2

35 ,42, 44, 45, 49, 50 : if 1