III. Выберите соответствующую форму:

1. Pressure is known … equally in all directions.

1. to be acted

2. to have acted

3. to act

2. This motor is claimed … for 24 hours without stopping.

1. to run

2. to have been running

3. to be run

3. The cutting speed depends on the material … .

1. to machine

2. to be machined

3. to be machining

4. The characteristics of the new engine are believed … .

1. to improve

2. to be improving

3. to have been improved

5. This experiment is sure … next month.

1. to give good results

2. to be given good results

3. to have given good results

IV. Найдите эквивалент следующим английским предложениям:

1. You know an alternating current to be continuously changing.

1. Вы знаете, что переменный ток постоянно изменялся.

2. Известно, что переменный ток будет постоянно изменяться.

3. Вы знаете о постоянном изменении переменного тока.

2. Would you like the plan to be improved in anything?

1. Вы хотели изменений в плане?

2. Хотели ли бы вы, чтобы план изменил что-либо?

3. Хотелось бы вам, чтобы план в чем-то был улучшен?

3. These storage devices are reported to have been described in some journals.

1. Как сообщают, эти устройства для хранения памяти описаны в некоторых журналах.

2. Об этих устройствах для хранения памяти пишут некоторые журналы.

3. Об этих устройствах для хранения памяти, как сообщается, напишут в некоторых журналах.

4. These substances were to be used as catalysts.

1. Эти вещества должны использовать катализаторы.

2. Эти вещества были использованы как катализаторы.

3. Эти вещества должны были быть использованы как катализаторы.

5. To decrease prices you should reduce the cost of the product.

1. Снижение цен снижает себестоимость изделия.

2. Чтобы снизить цены, вам необходимо снизить себестоимость изделия.

3. Снизив цены, снижаем себестоимость изделий.

V. Укажите номера предложений с инфинитивом – обстоятельством:

I.

1. To coordinate their efforts was the scientists’ task.

2. The scientists were asked to coordinate their efforts.

3. The scientists united to coordinate their efforts.

II.

1. The committee is to consider all the offers.

2. To consider all the offers the committee gathered in the hall.

3. To consider all the offers was a serious problem for the committee.

III.

1. To carry out such an experiment became an unsolved task for the researchers.

2. The researchers decided to carry out such an experiment within a short period.

3. The researchers did their best to carry out such an experiment within a short period.

IV.

1. To explain a law of applied mechanics a student should know theory well.

2. To explain a law of applied mechanics means a good theoretical knowledge of a student.

3. A student is to explain a law of applied mechanics at the seminar.

V.

1. To complete his experiment he was explained how to use the data available.

2. He was explained how to complete his experiment.

3. To complete an experiment was a final stage in his research work.

VI. Укажите номера предложений с инфинитивом – подлежащим:

I.

1. To be really suitable copper was to soft.

2. To understand this phenomenon is to understand the structure of atoms.

3. To use radio-controlled models the equipment must be reliable.

II.

1. They are glad to have obtained such results.

2. To show how reliable the device is was not difficult at all.

3. She was told to take part in the conference.

III.

1. To listen to such music is very pleasant.

2. I wanted to translate this article.

3. To master English you must work hard.

IV.

1. To acquire good knowledge in English you must work hard.

2. To get me a job he used his influence.

3. To make mistakes is easy.

V.

1. To transform one element into another we must change the charge of its molecules.

2. To build up a magnetic field requires a certain amount of energy.

3. To lower the costs a new machine was developed.