( ) ( ) , - () () .
, :
1) (Passive Voice):
know (),say (),suppose (), expect (), assume (), report (), consider (), prove () .;
2) (Active Voice):
seem (-, ), appear, turn out, prove (), be likely (), be unlikely (), be sure (), be certain ().
:
This device is supposed to be used in the experiment. , .
, , : It is supposed that this device will be used in the experiment.
This device seems to be of great interest. -, .
:
It seems that this device is of great interest.
, Complex Subject , : 1) -, , - (, , . .), 2) , 3) 4) , .. (Simple) (to use), , (Continuous) (to be using), , (Perfect) (to have been used), . :
This value is known to be changed. , .
This value is known to be changing now. , .
This value is known to have been changed. , .
not , , , . :
These phenomena do not appear to have been studied. , .
, , . :
This reaction was not expected to start at lower temperature. , .
Complex Subject, , . :
The problem should be considered to have been solved. , .
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The instruments can then be found to be very useful for the investigations being conducted. , .
to be , .
by, , , . :
The above mentioned method is thought by some people to be very difficult. , .
The goods are reported by the contractors to be delivered next week. , .
