□ Certainly, she knew that something was wrong. - She must have known that something was wrong.
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I. I am sure the information was wrong. 2. She was obviously upset by something.
3. Probably, he recognized you by your photo in the papers. 4. He is sure to be in at this
time. 5. Of course, she is trying to help you. 6. She is certain to be waiting for you at home.
7. Probably, the play is over by now. 8. There is little doubt that the first experiment failed.
9. No doubt, she knew what she was about to do. 10. I'm sure she is very fond of the child.
II. They are sure to have taken the wrong turning. 12. Probably, the dog was hungry.
Ex. 12. (В, С) Open the brackets using the correct form of the infinitive. Translate the sentences into Russian.
1. George must (be) pleased that he has passed his examination. 2.1 found this baby bird at the foot of the tree. It must (fall) out from a nest. 3. During the storm, the captain was on the bridge the whole time. He must (be) exhausted afterwards. 4. If Fred left here at four o'clock, he must (be) home by now. 5. Look, there's a tree right across the road! So there is. It must (be) blown down by the gale last night. 6.1 sat on a seat in the park and now my coat is covered with green stripes. The paint must (be) wet. 7. As soon as I switched on my new electric cooker there was an explosion. There must (be) something wrong with it. 8.1 don't know at what time I went to bed last night, but it was late. It must (be) after midnight.
9. Look, the streets are wet; it must (rain) now. 10. He promised to come at six, but he
didn't. He must (forget) his promise. 11.1 didn't hear the telephone. I must (be) asleep.
12. He must (be) very careless if he makes such mistakes. 13. The baby woke up when she
went into the bedroom. She must (make) noise. 14. The taxi-driver got to the airport in half
an hour. He must (drive) very fast. 15. He never got the Fetter. It must (send) to the wrong
address.
Ex. 13. (В, С) Translate the following negative sentences into English.
Model 1: □ Она, должно быть , не дала ему возможности возразить.
She must have given him no opportunity to object. 1. Должно быть, он не сделал ошибки. 2. Должно быть, они не обедали. 3. Должно быть, она не имела опыта. 4. Должно быть, он не дал ответа. 5. Должно быть, они не принимают мер. 6. Должно быть, она не обращает внимания на это. 7. Должно быть, у них нет книг.
8. Он, должно быть, не получил ответа. 9. Должно быть, денег за работу они не получили.
10. Она, должно быть, не старалась (take the trouble) сделать это правильно.
Model 2: □ Должно быть , он об этом не знал.
Evidently, he didn't know about it. □ Он, вероятно , не знает.
He probably doesn't know. 1. Должно быть, они еще не пришли. 2. Вероятно, они этого не знают. 3. По-видимому, это не было сделано вовремя. 4. Вероятно, это не здесь. 5. Это, должно быть, не заняло много времени. 6. Должно быть, он придет завтра.
Ex. 14. Translate the sentences.
1. Должно быть, он хорошо знает язык. 2. Должно быть, он еще здесь. 3. По-видимому, он унес бумаги с собой. 4. Очевидно, здесь уже кто-то был. 5. Вероятно, они над нами смеются. 6. Должно быть, они тогда жили здесь. 7. Должно быть, идет дождь. 8. Вероятно, дождь уже прекратился. 9. Должно быть, он как раз чинил пробки (fuse).
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