The document discusses tenses in English and provides details about the four forms of present tense:
1) Present simple is used to express habitual or repeated actions, facts, thoughts and scheduled events.
2) Present continuous expresses actions that are happening now or in progress.
3) Present perfect is used for actions that began in the past and continue to the present or have recently stopped.
4) Present perfect continuous also expresses ongoing actions that started in the past and may still be continuing.