Used to talk about routines or habits.
Used to talk about something that is generally true.
I go to work on weekends.
Ana doesn't have class on Saturdays.
Used to talk things happening at the moment of speech.
Used to talk about events happening in the future
Pron.+verb be+verb(ing)+complement.
They aren't enjoying the event.
Used to indicate a link between the present and the past.
Pron.+have+participle verb+ complement.
I have missed the bus lately.
John has done his homework.
Julie hasn't gone to bed.
Present perfect continuous.
Used to refer to an unspecified time between 'before now' and 'now'.
Pron.+have+been+verb(ing)+complement.
Martin has been staying at his brother's house.
I've been eating tuna fish all these days!
Elena hasn't been sleeping well.