Учебное пособие предназначено для бакалавров всех специальностей и направлений подготовки радиотехнического факультета. В нем представлены материалы для аудиторной и самостоятельной работы

Active
Passive
Present Pres. Cont Perfect Pert. Cont.	(to) lose (to) be losing (to) have lost (to) have been losing	(to) be lost - (to) have been lost -

The bare Infinitive is used:
1. after modal verbs (can, should, must, etc.): e.g. He should apologize to his parents. BUT: ought is followed by to-infinitive: e.g. She ought to find a job.
2. after the verbs let, make, see, hear and feel: e.g. They saw her talk to the manager.
BUT: be made, be heard, be seen + to –Infinitive (passive): e.g. She was seen to talk to the manager.
3. after had better and would rather: e.g. You had better see a doctor.
4. Help is followed by either the to-infinitive or the bare infinitive.
e.g. She helped me (to) fill in my application form.


TASK 10. Fill in the gaps with “to” if necessary.
1. How could electricity ... be used ... send a message? 2. For two years Tom Watson and Alexander Bell were working together ... build a machine that people could ... be used ... talk to one another over long distances. 3. The camera-tube will ... allow the user ... switch from a wide view of the room to the face of the person speaking. 4. There is a mirror attachment, which allows the camera ... scan documents, which may be lying on the table. 5. Satellites help … minimize all the difficulties that may appear. 6. One CD-ROM disk can ... replace 300,000 pages of text – about 500 floppies, which represents a lot of savings in databases. 7. Superconductors are extremely difficult ... fabricate into wires. 8. Superconductor ceramics are substances which can ... transmit electric currents with no loss of energy at temperatures much higher than conventional superconductors. 9. If a current is induced by a magnetic field in a ring of superconducting material, it will ... continue ... circulate when the magnetic field is removed.


TASK 11. Complete the second sentence using the word given, so it has a similar meaning to the first sentence. Write between two and five words in each gap.

1. 
   He can easily create a new gadget to meet his needs.
   

FOR It is not difficult … a new gadget when he needs it.

2. 
   It is impossible to maintain the technological development without new scientific data.