The document discusses the use of the present simple tense. It is used to talk about habits, facts that are always true, and facts that are true for a long period of time. Specifically, the present simple can be used with adverbs of frequency to describe habitual actions, it can state facts that are always true regardless of time, and it can provide information that is ongoing and has been true for a significant duration.

1. THE USE OF PRESENT SIMPLE
I. We use Present simple to talk about the habit.
Eg. I usually go to school by bus.
( It is usually used with adverbs of frequency:
always – usually – often – sometimes – occasionally – seldom -- rarely --
never
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II. We use Present simple to talk about the fact that is always true.
Eg. The sun rises in the east.
III. We use Present simple to talk about the fact that is true for a long time.
Eg. I am a teacher of English at Ha Noi University of Science and Technology.