Present tenses: simple, continuous, perfect simple and perfect continuous.
I'm teaching an english class.
Mike doesn't drive to work.
Joe is flying to New York for a business meeting this week.
They are arriving at 10 o'clock tomorrow.
The restaurant doesn't open at 8.
YOU
HE/SHE/IT
WE
THEY
RUN
RUN
RUNS
RUN
RUN
AM RUNNING
ARE RUNNING
IS RUNNING
ARE RUNNING
ARE RUNNING
Actions happening now
Temporary situations
Actions around the time of speaking
Future arrangements
Daily routines
Repeated actions (adverbs of frequency)
Habits
Permanent states
Timetables/Schedules (future meaning)
General truths and laws of nature
PRESENT SIMPLE
PRESENT CONTINUOUS
*To express things you have done in your life (experiences).
*To express number of times you have done something.
She has seen that movie twice.
This is the best food I have ever tried.
Have you travelled out of the country?
Actions started in the past, continue in the present and will continue in the future.
He has been reading since 11:00 am.
I am tired because I have been working for three hours.
PPS: already, yet, never, ever, just, always.
PPC: all day long, all night long, all morning, how long, a long time.