Main uses:
1) The facts that are always true, situations that exist now or will go on indefinitely
2) Habits
3) A state
Other uses:
4) Making declarations
5) Headlines
6) Instructions and itineraries
7) Summary of events
8) 'Historic present' in narrative and funny stories
Main uses:
Refers to actions which are in progress at the moment. These can be:
1) Temporary
2) Actually in progress
3) Generally in progress but not actually happening at the moment
Other uses:
4) Temporary situations
5) Repeated actions
6) Complaints about annoying habits
7) With verbs describing change and development
just, for, already, since, yet, so far, still
1) Present event
2) Repeated actions, happen in the past and repeat to present
3) Focus on the result -> 3 times, ...
4) Report in newspaper
Present perfect continuous
1) Action happened in the past, last to the present and future