VI. Analyse the functions of the verb to be. Translate the sentences:

1. The results of the experiment are of great importance for our further work. 2. There are no chemical plants in our town. 3. The substance that we are speaking about is water. 4. We are to translate technical literature in the second year. 5. It was the study of natural phenomena that made it possible to formulate various laws. 6. Technical progress is now impossible without high-quality materials. 7. Electronics is being used more and more throughout the industry. 8. The electron is a particle. 9. The machine is of five parts. 10. Our task is to finish the test by 7 o’clock. 11. Radio was invented by a talented Russian scientist A. S. Popov. 12. Words in a dictionary are in alphabetical order. 13. Smoking is dangerous. 14. The temperature is three degrees above zero. 15. My friends are mostly students. 16. It is the only positive solution. 17. The British are very proud of their sense of humor. 18. The scientific discovery was the result of six years research. 19. Our aim is to accomplish this task as soon as possible. 20. He will be an engineer in two years. 21. Their house is in the middle of the village.

5. Perfect Tenses (Active / Passive)

I. Translate the following sentences paying attention to the use of perfect forms:

1. High frequency amplification has made it possible to receive signals from weak transmitters over long distances.

2. As a recognized engineering subject, electronics has come into its own only recently.

3. Electronics has entered nearly every field of technical progress and has supplied well-established methods in many fields, including control, measurement and testing.

4. Electronic devices have revolutionized life.

5. We have found that the core, or nucleus of the atom is a tremendous storehouse of energy.

6. Most of the robots have involved a computer of some kind or another.

7. When all of the grouping, editing, and selecting has taken place, the computer prints its results.

8. Recently, scientists have been able to build electronic robots that really can play chess.

9. Science and technique have changed human life during the last hundred and fifty years, and the changes continue at an increasing speed.

II. Make the sentences interrogative and give short answers:

1. We have applied a human process to machines to make them robots.

2. After the telemeter has sorted out the messages, it sends them to a number of recording devices.

3. Scientists have developed different types of lasers.

4. Automation has been particularly successful at hydropower stations.

III. State the tense forms and translate the following sentences:

1. They had completed all the operations on electrical quantities by that time.

2. This unit will have converted the information into pulse form before that procedure.

3. The instrument partly lost its former efficiency after we had used it for a long time.

4. We learned that Maxwell’s equation had led to Hertz discovering radio waves which, in turn, had resulted in Popov’s invention of wireless telegraphy and developments in radio engineering.

5. They will have covered all parts of mechanism with a thick coat of paint before the start of the experiment.