fixed arrangement , He's flying to Madrid tomorrow., gradual development (of nature, society, economy, etc), It's September. The leaves are slowly turning golden and brown. , timetables of public transport, businesses, schools, exams etc, The shop opens at 7 a.m., present state, which can either be connected to the current moment or the general present (of time/weather/quality), I'm on a diet., law of nature, All children grow up to be adults one day. , the speaker who says this is annoyed with the person doing this action, My daughter's never listening to me! , result/consequence of a past activity observable in the present, Oh Dear! Look what you've done!, life experience of a person (as we're still alive, so is our experience, which lives on with us), I've been to Paris twice before., present temporary situation (either one of us or we both know about it) at the time of speaking, Sorry, she's a bit busy now. She's talking to her boss., action which started in the past and continues up to the present, with emphasis on duration, I've been working in the garden since morning..

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