Инфинитивные конструкции: Лексико-грамматический практикум по английскому языку. Марченко О.В. - 61 стр.

      4. The method of scanning can be used for pictures to be sent
by electricity.
      5. In order for the molecules to react they must be in contact.
      6. For a device to be called electronic, electricity must flow
across the space inside the device and be controlled by the device.
      7. The speed of sound may be found if we measure the time
required for it to travel a measured distance.
      8. It requires a little more than two-fifteenths of a second for
light to travel round the earth at the equator.

     Óïð. 12. Îòâåòèòü íà âîïðîñû, èñïîëüçóÿ êîíñòðóêöèþ «for
+ Infinitive». What is necessary for.
     1. water to turn into ice?
     2. the reaction to accelerate?
     3. the atoms to form a molecule?
     4. an atom to become an ion?
     5. a metallic bar to become a magnet?

     Óïð. 13. Ïðî÷èòàòü, ïåðåâåñòè íà ðóññêèé ÿçûê. Çàìåíèòü
êîíñòðóêöèþ «for + Infinitive» íà ñòðàäàòåëüíûé çàëîã.
     1. It is necessary for us to consider this question at the next
meeting.
     2. It was necessary for the students to repeat the experiment.
     3. We had to wait for the lecturer to finish his lecture before we
could approach the instruments and examine them.
     4. Rows of various instruments stood on the tables for all to see.
     5. It was impossible for anyone to doubt that the new instru-
ments would eventually be widely used in industry.
     6. For the experiment to be successful the right conditions were
necessary.
     7. It was impossible for the experimenter to guess what results
would be.

     Óïð. 14. Ïðî÷èòàòü, ïåðåâåñòè íà ðóññêèé ÿçûê.
     1. A large portion of the methods for the analysis of inorganic
substances to be investigated involves treating an aqueous solution of
the substance with known chemicals.
     2. For the remarkable properties of rubber to be carefully ex-
amined, one has to carry out a long series of experiments.

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