4. Переробіть речення за зразком:

A. Зразок They began to work at this plant 20years ago. – They began working at this plant 20 years ago.

1. We continue to study English.

2. They preferred to go there by plane.

3.1 have just begun to translate the text.

4. They attempted to analyze the end products for carbon dioxide.

5. Thus in certain cases sedimentation velocity method allows one to obtain information on separate components

B. Зразок: It is useless to learn rules without examples. – It is no use learning rules without examples.

1. It is useless to speak of it.

2. It is useless to use carbon dioxide in this alloy.

3. It is useless to rely on these calculations.

4. It is useless to use ammonia in this cycle.

5. It is useless to start this procedure from the very beginning.

C. Зразок: After we cooled the substance to 15°, the pressure dropped to 20 atm. — After cooling the substance to 15°, the pressure dropped to 20 atm.

1. After they passed their exams, they went to the museum.

2. Before they started the engine they tested the piping for leakage.

3. After he wrote the letter she went to the post-office.

4. Before you start your calculations check the data.

5. After they removed the water the reaction started.

D. Зразок: She insisted that she would go to the library. She insisted on going to the library. — She insisted that she should be sent to the library. She insisted on being sent to the library.

l. They insisted that they should help me.

2. They insisted that they should be helped with their work.

3.1 insisted that I should examine them in the afternoon.

4.1 insisted that I should be examined first.

5. He insisted that he should show them the way.

6. He insisted that he should be shown the way.

5. Встановіть форму і синтаксичну функцію герундія в наступних реченнях. Перекладіть речення на українську мову

1. Oxidation led to the reaction taking another course.

2. This is due to the reaction running at a low temperature.

3. This new reaction mechanism has led to the yield having dropped.

4. There are unmistakable proofs of Pauling's having been wrong.

5. We have already referred to the reaction having resulted in alkanes.

6. They pointed to the reaction proceeding via two routes.

7. This was due to the central atom being screened.

8. The probability of this finding being due to chance is one in 22,600.

9. The extraction process is only economic on the basis of uranium being a by-product of the superphosphate.

10. Nitrobenzene cannot be heated above 170° with sulfuric acid without violent decomposition occurring.

11. They could depend on the laboratories supplying them with starting compounds.

12. This must have taken place as a result of the molecule having changed its conformation.

13. It may well be that due to the molecule neither splitting off nor change in configuration has taken place.

14. The second theory was given preference due to its being based on more recent data.

15. In view of the reaction proceeding via another route the results proved a surprise.

16. High yields were obtained due to starting products being extremely pure.

17. Care must be taken to prevent moisture from the bottle diffusing into the carbon dioxide tube.

18. If the trap is too full, there is danger of acid being sucked into the system.

19. The result is a direct consequence of the activated complex being in equilibrium with the predominant forms of the reactants.

20. No evidence has been found for any of these compounds maintaining their configuration at the atom to which the metal is attached.