Learn about the Present Perfect
Present Perfect = result now
We use the present perfect when something happened in the past, and has a result now - especially a result you can see.
I've broken my leg.
(present perfect: result now - my leg is still broken)
I broke my leg three years ago.
(past simple: the result is finished - my leg is better now).
Present Perfect Simple or Continuous?
Present Perfect Simple is used with short, single, finished actions, and when we say how many.
Present Perfect Continuous is used with longer, repeated or unfinished activities.
I've written 5 letters today.
(simple: finished, we say how many/much)
I've been writing letters all morning.
(continuous: repeated, emphasis on how long)
Oh no!!! What have you done?!!!
(simple: look at the result!!!)
What have you been doing recently?
(continuous: I'm interested in the activity)