instantaneous use describing an action taking place now

the 'performative' use of the present simple

timeless use describing habits

instantaneous use describing a sequence of events happening now

timeless use describing facts always true

limited duration use

timeless use describing attitudes

timeless use expressing irritation

I unlock the case like this, key in this number, see, and make sure it's locked afterwards

Greece lies in the south of the Balkan peninsular

He takes the prize for pig-headedness

He's forever griping about his back

I'm working nights

I don't take sugar in coffee but I do in tea

I name this ship ...

Answer the phone, please, I'm taking a shower