Lesson 9

Условные придаточные предложения Значения слова provide Суффиксы -th, -en Префиксы sub-, under-, non-Text 9A. Descending to New Ocean Depths Text 9B.

Text 9C. Lifeboats Text 9D. Greenwich

ПРЕДТЕКСТОВЫЕ УПРАЖНЕНИЯ

Упражнение 1. А. Определите тип условного придаточного предложения, переведите.

1. If we look around, we can see that electricity is serving us in one way or another. 2. If I were free, I should help you with plea­sure. 3. If we had tested this material, we should have used it in our work. 4. If ordinary gases are greatly compressed, they become liquids. 5. If supercomputers had not been used for thermodynamic calculations, designers would have spent all their lives on computa­tions. 6. If you think that a computer never makes mistakes, you are wrong. 7. If extreme temperatures generated by atmospheric friction were not so high, a hypersonic craft would not require complicated cooling measures. 8. If we had been told about the lec­ture on reliability in spacecraft production, we should have come by all means. 9. Superconductivity can be obtained in some materi­als if the temperature is very low and close to absolute zero.

В. Поставьте глагол в скобках в соответствующую форму.

1. It you (to know) English well, you will be able to read books in the original. 2. If I get this book, I (to be) very happy. 3. You (to become) much stronger if you did your morning exercises regu-

larly. 4. If she went to work in France, she (to learn) French very quickly. 5. If he (to see) her, he would have spoken to her. 6. I (to help) them if I had been at home. 7. You (to write) the testwork well if you have learnt grammar. 8. If she (to ask) me yesterday, I should have told her about it. 9. If we had not been present at the lecture, we (not to understand) the new approach to the solution of the problem.

С. Закончите предложения.

1. I would work much better if.... 2. Life would be much sim­pler if.... 3. Use every opportunity to practice English if.... 4. I would have started to study English earlier, if.... 5. I would have had more opportunities, if....

Упражнение 2. А. Измените предложения согласно образцам: