PRESENT PERFECT CONTINUOUS

Για να σχηματίσουμε τον Present Perfect Continuous χρησιμοποιούμε το have/ has + been + μετοχή ενεστώτα. 

e.g. Mary has been sunbathing all morning. 

Κλίση 

Affirmative	Interrogative	Negative
I have been working	Have I been working?	I haven’t been working
You have been working	Have you been working?	You haven’t been working
He has been working	Has he been working?	He hasn’t been working
She has been working	Has she been working?	She hasn’t been working
It has been working	Has it been working?	It hasn’t been working
We have been working	Have we been working?	We haven’t been working
You have been working	Have you been working?	You haven’t been working
They have been working	Have they been working?	They haven’t been working

Κανόνες 

1. Για μια πράξη που άρχισε στο παρελθόν και συνεχίζεται μέχρι τώρα. Συνήθως χρησιμοποιείται με το since και το for. e.g. I have been watching tv for two hours. 
2. Για μια πράξη που γινόταν συνεχόμενα ή είχε διάρκεια στο παρελθόν και τώρα μπορεί να έχει τελειώσει αλλά τα αποτελέσματα της είναι φανερά στο παρόν. e.g. she’s tired, she has been studying all day. 

Time expressions 

1.   Since (από). I have been studying English since 10:00
2. For (για). I have been studying English for 4 hours
3. How long (πόσο καιρό). How long have you been living here?