1. if (phone) me earlier, we could have bought this book. 2. i can’t stand mr. brown! / tell a lie 3. ) at this problem for three months. we’ll be able to see the presentation next week. 4. / buy) a new car. we can go to the see. 5. before olga came to london, ) english for three years. 6. when her mother came home, ) the room since morning. 7. thank you ) in time. 8. there is no reason ). 9. if the train ) in time, we would not have been late at the concert. 10. yesterday at 5 o’clock tom ) his homework and could not go for a walk. 11. yesterday by 5 o’clock ) his homework and could go for a walk. 12. if you ) me, i would go to the cinema. 13. when her mother came home, ) the letter ) to the park with her friends. 14. if he buy) a car, we’ll go to the see. 15. if ) a car, we would go to the see. 16. if )a car , we would have gone to the see. 17. my father ) here for three years. 18. my repair) this car since morning. 19. if i had learned the grammar rules, i /get) a bad mark. 20. if i learned the grammar rules, / get) a bad mark. 21. if i learn the grammar rules, not / get) a bad mark.