Unit I. Electricity ………………………………………………………….. 3 Grammar Study. Simple Tenses, the verb “to be”……………… 11

Unit II. Computers…………………………………………………………. 16

Grammar Study. Сontinuous Tenses, the verb “to have”……… 25

Unit III. Communication…………………………………………………... 26

Grammar Study. Perfect and Perfect Continuous

Tenses, the verb “to do”…………………………………………… 41

Unit IV. Data Transport of Communication…………………………….. 50

Grammar Study. English Tenses in the Passive Voice………… 59

Unit V. Electricity: Energy of the Future………………………………… 63

Grammar Study. The verbs “should”, “would”.

Subjunctive Mood, Conditionals, since, for, as,

because, because of, as well as, as to, due to………………….. 74

Key………………………………………………………………………….. 85