11. Read the examples of cmc and complete this table.
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Extract
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Type of CMC
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Number of participants
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Topics
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Synchronous or asynchronous
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Special features of this type of CMC
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Grammar. Modal Verbs can and should.
We often use can when we talk about physical or mental abilities and about possibilities. The past form is could. The future is be able to.
1.When we were at school, you could speak English better than me.
2. Everyone can send e-mail if they have the Internet.
We use should to give advice. To give very strict advice, you can use must.
Children shouldn’t use the computer more than an hour a day.
You should call him Professor Peters.
You must back up your files after work; otherwise you can lose them accidentally.
12. Use can/can’t or should/shouldn’t in the following sentences.
1. The weather is very cold today. You … wear a warm coat and a hat.
2. When I was small, I was very shy. I … recite poems in front of the class.
3. If you don’t want to damage your notebook, you … carry it in a case.
4. I don’t like History; I … remember all the dates.
5. Your sister … go out on her own in the evening, it’s very dangerous.
6. You … leave expensive things in the car when you leave it, they … be stolen.
7. When writing a course paper, you … use material from the Internet. You … take it from the books.
8. You look ill, you … see the doctor as soon as possible.
Writing.
13. Write some sentences to tell what you should/shouldn’t do to keep data on your computer safe.
14.Write the translation of paragraph 4.
Language Study. –ing forms.
We can use the –ing form of the verb as a noun. It can be the subject, object or complement of a sentence. For example:
1. Managing the computer’s resources is an important function of the operating system.
2. The operating system starts running the user interface as soon as the PC is switched on.
3. Another function of the operating system is executing and providing services for applications software.
The –ing form is also used after prepositions. This includes to when it is a preposition and not part of the infinitive. For example:
4. Without the user being aware of the details, the operating system manages the computer’s resources.
5. We begin by focusing on the interaction between a user and a PC operating system.
6. We look forward to having cheaper and faster computers.
15. Rewrite each of these sentences like this.
An important function of the operating system is to manage the computer’s resources. – Managing the computer’s resources is an important function of the operating system.
1. One task of the supervisor program is to load into memory non-resident programs as required.
2. The role of the operating system is to communicate directly with the hardware.
3. One of the key functions of the operating system is to establish a user interface.
4. An additional role is to provide services for applications software.
5. Part of the work of mainframe operating systems is to support multiple programs and users.
6. The task in most cases is to facilitate interaction between a single user and a PC.
7. One of the most important functions of a computer is to process large amounts of data quickly.
8. The main reason for installing more memory is to allow the computer to process data faster.