Present Forms
Present Perfect
Present Simple
Present Continuous
Present Perfect Continuous
to give instructions
timetable
Daily routine
general truth
repeated actions
planes
permanent states
actions taking place now
trains
changing situations
programmes
arranged plans for the near future
to express annoyance
Changing situations
developing situations
temporary actions
reviews
narration
usually, often, always
every day\week\month
time expressions: now, at the moment, these days, still
in the morning\afternoon\evening
at night
at the weekend
sports commentaries
on Monday\Tuesday etc
recently finished action
an unstated time in the past
actions whose period is not over yet
for, since, already, yet, always, just, ever, never, so far, today, this week/month
With state verbs: be, have, like, know
to announce a piece of news
an action started in the past but continues up to the present
Use for and since
visible result
for, since, how long
Action may still going on
Action may have finished
The result of action is visible
express anger, irritation
duration of an action
An action started in the past and lasted for some time
how long, lately, still (in negations)
the emphasis is placed on the action
the exact time is not mentioned because it is either unknown or unimportant