Grammar practice Section

Verb + -ing or infinitive. 1. Match the sentences with the explanations.

1. Verb+-ing	a. They stopped looking/to look at the flowchart.
2. Verb+being+verb in the 3^rd form	b. To prevent anyone changing the data he disabled the keyboard.
3. Verb+-ing/infinitive=little change in meaning	c. The programmer didn’t let me install this new operation system.
4. Verb+to be+verb in the 3^rd form	d. Some viruses cause computers to crash.
5. Verb+object+to+infinitive	e. Some people can’t afford to buy a modern PC.
6. Verb+bare infinitive (without to)	f. The company intends to use/using computers in the production process.
7. Verb+-ing/infinitive=change in meaning	g. Invalid data risks being processed incorrectly.
8. Verb+to+infinitive of purpose	h. Any new software requires to be tested before use.
9. Verb+to+infinitive	i. Ana­lytical engine was invented to store data.

2. Put the verbs in brackets into the correct form (–ing or infinitive). Sometimes both are possible.

1. Backing up involves (copy) current working files onto a separate storage disk.
2. Don't forget (save) the file before switching off.
3. The engineer managed (recover) all the lost data, though it took a long time.
4. I remember (shut) down the computer before I left the room.
5. Scientists considered silicon (be) one of the best materials for the creation of an IС.
6. Experts expect computers (become) the most commonly used devices.
7. If you don’t save your document every few minutes you risk (lose) all the work you’ve done.
8. Keyboard enables (input) numerical and text data.
9. They want this software (simulate) the action of an aircraft.
10. This program seems (work) correctly the first time it is tested.
11. Computers were designed (perform) thousands of com­putations per second.
12. Engi­neers expect these new devices (test) very soon.
13. The hacker denied (break) into our computer system.
14. Banks spend millions of dollars (try) to stop new kinds of computer crime.
15. Blue-ray discs let you (store) far more data than DVD discs.
16. Using computers (create) graphics and sounds, virtual reality makes the viewer (believe) he or she is in another world.

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