reduce, to cool, to keep, to support, to award, to concern, to offer, to cut, to
place, to encourage, to know, to develop, to limit, to direct, to move, to shape, to
arrange, to hold, to give, to invite, to include, to design, to make, to present, to
write, to derive, to reach, to take, to think, to obtain, to speak, to pay, to send.
II. Form:
a) Passive Indefinite Infinitive
to see - to be seen
to ask - to be asked
b) Passive Continuous Infinitive
to finish - to be being finished
to write - to be being written
c) Passive Perfect Infinitive
to shape - to have been shaped
to think - to have been thought
to discover, to influence, to base, to perform, to lay, to tell, to do, to give,
to examine, to arrange, to provide, to elaborate, to construct, to set, to study, to
complete, to replace, to offer, to undertake, to understand, to put, to accept, to
investigate, to recognise, to evaluate, to need, to suggest, to study, to discuss.
III. Identify the sentences in the Passive Voice.
1. The first industrial revolution took place in England. 2. Efficiency is achieved
by using efficient methods, devices and personnel organisations. 3.
Automation was first applied to assembly line manufacturing. 4. We rarely use
those substances in our research because they are not always available. 5.
The fourth industrial revolution is characterized by the use of automated
programmable machines. 6. This pioneer study will involve a lot of difficulty.
7. After Dr. Robinson had finished that fundamental research he gave a
complete account of the work. 8. All the things for the experiment are ready.
9. Single shaft turbine generators are being successfully constructed today.
10. The new method will come into use when suitable appliances and devices
are provided. 11. The negative results had been obtained before modern
equipment was installed. 12. Our professor is going to write a paper on the
subject of powdered metals. 13. These two principles have been accepted
without question by later writers on the subject. 14. The laboratory assistant has
described the procedure in detail. 15. A plasma may be completely ionized in
which state all the molecules are devided into ions and electrons.
IV. Make the sentences a) interrogative; b) negative.
1. Sound was amplified by a loudspeaker. 2. We shall be given new equipment.
3. The experiment had been completed by the end of the last year. 4. The
lecture was being listened to with great attention. 5. Plastics are used in
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