31. If I had a mobile phone, I could have called her last night
32. If he had found a job, he would not be searching for one now
33. If I were you, I would study hard.
34. If his friends had not been so late, they would not have missed the train
35. If you stop talking, you will understand the lesson
36. if the boy was old, they could go to school
37. If you aren't calm, you will make a wrong decision.
38. If he did not smoke, he would not be weak
39. If it was not cold, we could go swimming
40. If I had not been busy, I would have watched tv last night
37/