Укажите времена глаголов в следующих предложениях:

1. Such question can not be answered at once.
2. The rate of the reaction is to be influenced by gas temperature.
3. Einstein’s theory of relativity has to be referred to by many researchers.
4. All the instruments should be looked at with great interest for they are
widely used in the lab.
5. The liquid was to be allowed to evaporate.
6. This insoluble compound should not be affected by acids.
7. It must be noted that this huge automatic unit is operated by only a few
men.
8. It is to be remembered that concentrated acids are very dangerous.
9. All the devices and glassware are to be kept in good order in the laboratory.
10. Nitric acid may be obtained by the reaction of concentrated sulfuric acid
with sodium nitrate.

Заранее

Решение #

1 used to/would

2 used to

3 didn't use to

4 used to/would

5 didn't use to

6 used to/would

6 Complete the sentences with used to or didn't use to. In which sentences could you also use would?

1 When I was a child, we used to go camping every summer by a beautiful lake.

2 I used to play football three times a week, but I don't anymore.

3 I didn’t use to like vegetables very much, but I love them now.

4 When I was younger, I used to go for long walks in the countryside with my family.

5 In the past, people didn’t use to lock their doors around here, but they do now.

6 My brother Tom used to make fun of me all the time when we were kids.

1. He has changed so much. If you met him, you would not recognize him. 2. If I were in your place, I would consult with my parents. 3. If a tram came up now, we would not be late. If he knew it would upset you, he would be more careful. 5. If you helped me to solve this problem, I would be very grateful to you. 6. It is a pity that it did not occur to us earlier to look for a book in the library. We would have done the job on time and would be free now. 7. It is a pity that we had so few lessons. If we worked harder, we would know the language better. 8. If he did not regularly go to training, he would not have achieved such success in competitions. 9. If you had warned me in advance, I would have already been in Moscow.