II. 1. 1.
| Tenses Active Passive Indefinite to give to be given Continuous to be giving Perfect to have given to have been given Perfect Continuous to have been giving |
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read books is useful. . .
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2. - be + , :
understand this phenomenon is to understand the structure of atoms.
.
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1. explain this simple fact is not so very easy.
2. To give a true picture of the surrounding matter is the
task of natural science.
3. To compare the flow of electricity along a conductor
with that of a liquid in a pipe has become familiar.
,
. , . ? so as (to) ; in order (to) .
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1) (In order) to understand the phenomenon the laws of
motion should be considered.
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2) The air was rarified so as to diminish pressure.
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see the dependence, look at the graph.
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to (, )... (), such... as to ... ().
. too, enough, sufficiently ., , :
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1. The waves are too short to affect the eye.
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2. This method is not accurate enough to give reliable
results.
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3. The particle is sufficiently large to be clearly discerned.
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(... ... ...). , as so (so... as to), :
4. This method was so complicated as to give only little
result.
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, such (such... as to, in such a way as to), . , - :
5. It is such a small error as to be easily neglected.
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6. The device was arranged in such a way as to produce two pictures.
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. , . form, produce , give, yield .
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Hydrogen and oxygen unite to form water. , ( , ) .
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1) in order (to)
so as (to) ;
2) so... as (to) (, )...,
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such... as (to) ... ()
too ( -
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enough }
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sufficient
. : , , . . :
1. It has become possible to modify the Periodic Table
so as to bring out the structural features more clearly.
2. In order to understand the procedure, consider the
following analogy.
3. To ensure that the ampoule will not explode take the
precautions stated above.
4. It takes the rays of the sun 8 minutes to get to the
Earth.
5. A larger motor takes a long time to get up speed
owing to its inertia.
. . :
6. Molecules are too small to be seen even with the most
powerful microscope.
7. Phosphorus is too active an element to be found free
in nature.
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8. The surface tension of water is strong enough to let
a steel needle float on water.
9. Only the most swiftly moving molecules possess
sufficient energy to escape.
10. This substance is so brittle as to be easily ground to
a powder.
11. The molecules of water are fitted in between the
other molecules or ions of the crystal in such a way as to
make the crystal stronger and more stable than it otherwise
would be.
. , , :
12. Elements combine to produce a compound.
13. The atom may eject another particle to become a
different atom.
14. Attractions and repulsions often cooperate to reduce
the viscosity of molecules.
. , , :
15. S2 decomposes to yield sulphur and oxygen.
16. It is too early yet to properly weigh the significance
of this method.
17. To test the accuracy of the method prepare a solution
of known composition of these acids.
18. The frequency was so high as nearly to equal the
frequency of infrared rays.
19. Diamonds are cut, and their faces are ground and
polished so as to reflect and refract light beams.
20. The concentration of the reactants is altered in such
a manner as to reduce the velocity of the reaction.
21. Occasionally a surface molecule will become so agitated
as to break loose from its neighbours and to fly off into the
surrounding space.
22. Hydrogen gas reacts with iodine vapour to form
hydrogen iodine.
