. Раскройте скобки и поставьте сказуемое в страдательный залог. 1. The results of the experiments (to speak of) at the conference which was held last week in Moscow.
2. Usually the experiments (to follow) by calculations.
3. Action and reaction (never speak of) as balanced forces since they don’t act on the same body.
4. The Second Law of Motion describes what happens to a massive body when it (to act upon) by an external force.
5. The lectures on mechanics (to attend) by many students during the last term.
6. The development of science in Russia (to greatly influence) by M. Lomonosov

Упражнение  1.

1)  Does he learn new words in each lesson?

2)  Is Ann learning the new words right now?

3)  Do Tom and Jack usually sit at the third desk?

4)  Are your friends sitting at the third desk today?

5) Does your friend read many books every year?

6) Are you reading an interesting book now?

Упражнение  2.

1)  It is not raining very hard at the moment.

2) It does not rain very much in summer.

3) They do not have money for a new car.

4) Children are not watching a television programme now.

5) I do not see any students in that room.

Упражнение  3.

1) They are watching TV at the moment.

2) My brother writes letters to her mother every week.

3)  Iam sitting on the sofa now.

4) Listen. The telephone is ringing.

5) In summer we usually go to the seaside.

Объяснение:

present continuous

I am watching TV. – Я смотрю телевизор.

He is writing a letter now. – Он сейчас пишет письмо.

They are cooking breakfast. – Они готовят завтрак.

It is raining. – Идёт дождь.

The girls are talking and laughing. – Девочки разговаривают и смеются.

It isn't raining. – Сейчас дождь не идёт.

We aren't working. – Мы не работаем.

past continuous

Sally was reading a book when the doorbell rang. – Сэлли читала книгу, когда в зазвонил звонок.

The children were playing football all day long in the yard. – Дети весь день играли в футбол во дворе.

Between 2 and 3 p.m. o’clock Emily was cooking a dinner. – Между 2 и 3 часами дня Эмили готовила обед.

I was watching TV while he was doing his homework. – Я смотрела телевизор пока он делал домашнее задание.

They were walking along the seaside from 8 to 10 yesterday. – Они гуляли по набережной с 8 до 10 часов вчера.

We were drinking some coffee when boss called for us. – Мы пили кофе когда начальник позвал нас.

She was constantly talking with somebody. – Она постоянно болтала с кем-то.