Unit III must

Должно быть, он работает здесь с самого утра.
1. He must be working here since morning.
2. He must work here since morning.
3. He must have been working here since morning.
Он, должно быть, не правильно вас понял.
1. He must have misunderstood you.
2. He must not have understood you.
3. He must have not understood you.
По-видимому, они сейчас обсуждают результаты теста.
1. They must be discussing the results of the test.
2. They must have been discussing the results of the test.
3. They must have discussed the results of the test.
У вас не должно быть опыта вождения машины.
1. You mustn't have any driving experience.
2. You mustn't have had any driving experience.
3. You must have no driving experience.
Он, должно быть, будет спать, когда мы придем.
1. He must be sleeping when we come.
2. He must sleep when we come.
3. Probably he will be sleeping when we come.
Должно быть, он не в курсе происходящего.
1. He must have been unaware of the situation.
2. Probably he doesn't know anything about the situation.
3. He must not know about the situation.
Нужно ли мне помочь ему?
1. Mustn't I help him?
2. Must I help him?
3. I must help him?
Она, должно быть, забыла его адрес.
1. She must forgot his address.
2. She must not remember his address.
3. She must have forgotten his adddress.
Они, должно быть, не опоздали на поезд.
1. They must not have been late for the train.
2. They must haven't been late for the train.
3. They must have been in time for the train.
Он, должно быть, работает учителем уже пять лет.
1. He must be working as a teacher for five years.
2. He must have been working as a teacher for five years.
3. He must work as a teacher for five years.

Unit III must

Task 5