37. Complete the following sentences adding a principal or a subordinate clause with a suitable form of the verb.

1. It was some time since... 2. They were still waiting when... 3. ...after the teacher left (had left). 4. We hadn't been there for ten minutes before... 5. The doctor had scarcely examined the patient when... 6. ...since he returned from his expedition. 7. ...since we have been talking. Let's go home. 8. ...while we were discussing the matter. 9. ...as he sat think­ing it over again and again. 10. ...when the train arrived. 11. He will answer your letter after... 12. ...till the lesson is over. 13. ...before you ask such silly questions. 13. ...as long as you can. 14. ...as soon as he comes to Moscow. 15. ...before he (had) told her the news. 16. ...until the car passed. 17. ...when the plane had already taken off.

38. Translate the following sentences into English paying special attention to the use of the present perfect, past perfect and past indefinite.

1. Вы купили тетради? — Да. После занятий я зашла в магазин и купила тетради. 2. Сколько раз ты была в этом году в театре? — Только два. 3. Я плохо себя чувствую, так как плохо спала ночь. 4. Мы были рады видеть твою сестру, мы не видели ее с прошлого лета. Она очень изменилась. 5. Мальчики еще не вернулись из школы. Вчера они тоже вернулись очень поздно. У них дополнительные занятия всю неделю. 6. Мы не могли войти в дом, так как отец запер дверь, а у нас не было ключей. 7. Вы уже писали контроль­ную по грамматике? — Да, мы писали ее вчера. 8. Я уже выучил стихотворение и только повторяю его. 9. Сколько времени вы знакомы с Джоном? — Недолго. Я знаю его только полгода. 10. Мы послали ему письмо, но ответа еще не получили. 11. К шести часам они уже вернулись из кино. 12. Когда вы последний раз ездили в Крым? — Я вообще никогда не была в Крыму. 13. Дождь кончился и снова светило солнце. 14. Вчера я встретил своего приятеля, который только что вернулся из полярной экспедиции. 15. Он позвонил мне по телефону, как только я пришла домой. 16. Вы очень хорошо говорите по-английски. Это правда, что вы знаете английский с детства? 17. Он приехал в наш город три года назад, после того как окончил институт. Уже три года, как он работает учителем. 18. Мы пригласи­ли двух наших друзей обедать, но еще ничего не приготови­ли на обед. 19. Я давно о вас не слышала. Где вы были все это время? 20. Анна больна уже три дня. Она простудилась в воскресенье, когда мы ездили за город и попали под дождь.

39. Explain the difference between the meaning of the italicized forms in the following sets of sentences and translate the sentences into Russian.

1. a) When our visitor arrived, my wife was making tea. b) When our visitor arrived, my wife made tea. c) When our visitor arrived my wife had already made the tea. 2. a) When she got home her parents were having dinner, b) When she got home, her parents had already dined and were watching TV. c) When she got home she had dinner and watched TV for two hours instead of doing her homework. 3. a) The floor was covered with balls of wool: Mrs. Brown was knitting something, b) The floor was covered with balls of wool, obviously Mrs. Brown had been knitting something. 4. a) As he was getting into the bus, it started suddenly and he fell backwards on the road. b) As he got into the bus it started suddenly and he fell between the seats. 5. a) The mother had cooked the lunch and was waiting for the children to come home from school. b) She cooked lunch and sat down at the window to watch the children coming back from school. c) She had been sitting at the window for quite a while before the children came. As soon as she saw them she went to the kitchen for the dishes. 6. a) No sooner had the professor begun to speak than he was interrupted by the arrival of a group of students. They had been detained at the cloak-room. b) The professor had not yet begun to speak when another group of students entered the hall. 7. a) Clare has been washing the dishes since you have been mending your coat. b) Clare has been washing the dishes since you began mending your coat. Who will be the first to finish? 8. a) Peter worked for two years at a factory after he had finished school. b) Peter worked two years at a factory after he finished school. с) After he finished school he worked two years at a factory and then took his entrance examinations to the university. 9. a) Next month our English teacher will have been working at the institute for twenty-five years. b) I am sure that twenty years from now she will still be working here, as active as ever.