1.If you phoned me earlier, we could have bought this book. 2.I can’t stand Mr. Brown! He always tells a lie. 3.Steven works at this problem for three months. We’ll be able to see the presentation next week. 4.We have just bought a new car. We can go to the see. 5.Before Olga came to London, she has been learning English for three years. 6.When her mother came home, Helen was cleaning the room since morning. 7.Thank you for coming in time. 8.There is no reason in arguing. 9.If the train had come in time, we would not have been late at the concert. 10.Yesterday at 5 o’clock Tom did his homework and could not go for a walk. 11. If you phoned me, I would go to the cinema. 12.When her mother came home, she had written the letter and gone to the park with her friends. 13.If he buy a car, we’ll go to the see. 14.If he bought a car, we would go to the see. 15.If he had bought a car , we would have gone to the see. 16.My father has worked here for three years. 17.My father has been repairing this car since morning. 18.If I had learned the grammar rules, I would not have got a bad mark. 19.If I learned the grammar rules, I would get a bad mark. 20.If I learn the grammar rules, I wiil not a bad mark.
