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18. State the tense forms of the following verbs.

Model:

link  Present Indefinite (active voice)

does not link  Present Indefinite (negative form)

is circulating, have not moved, transmits, emitted, did not emit, has burnt, will not operate, act

19. Put down the tense forms of the verbs.

Model: to lower  Pres. Perf. have (has) lowered

to heat 

Past Indef.

 __________________________

to discharge 

Pres. Contin.

 __________________________

to remove 

Pres. Perf.

 __________________________

to bum 

Pres. Perf. Contin.

 __________________________

to waste 

Future Ind.

 __________________________

to demand 

Past Perf.

 __________________________

to move 

Future Perf.

 __________________________

20. Translate these negative sentences into Russian. What is the difference between the English constructions and the Russian ones?

1. No charges can move in an open circuit.

2. Nothing less than a map of the Universe is planned by the research.

3. No special equipment is necessary to carry out the experiment.

4. A current which does not change its polarity is called a direct current.

3. A dry battery is a type of a small battery containing no free liquid.

6. The efficiency of a machine can never be greater than unity; it is often given as a percentage.

7. A fast reactor is a reactor in which little or no moderator is used and in which, therefore, the nuclear fissions are caused by fast neutrons.

8. Electrically safe locations are those where conditions causing extremely high danger of electric shock do not exist.

9. No electric device has only advantages. All of them have also disadvantages.

21. Put down the negative form of the following verbs.

Model: moved  did not move

required

 _____________________________________

was operating

 _____________________________________

links

 _____________________________________

has demanded

 _____________________________________

will have been replaced

 _____________________________________

release

 _____________________________________

is transmitting

 _____________________________________

fissioned

 _____________________________________

Passive Voice Страдательный (пассивный) залог

Вид

Время

Present

Past

Future

Indefinite

am

supplied

was

supplied

shall

be supplied

is

are

were

will

Continuous

am

being supplied

was

being supplied

is

are

were

Perfect

have

been

supplied

had been supplied

shall

have been supplied

has

will

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