Present Perfect Continuous / Παρακείμενος Διαρκείας. ( Since when...? - How long...? )

Since when...? Από πότε...; 
How long...? Πόση ώρα, πόσο καιρό;

Διάβασε προσεχτικά τα παραδείγματα: Study the examples:


a) Since when have you been working for this company?
I have been working for this company since 1998.


b) How long have you been working for this company?
I have been working for this company for three years.

Click here to do the exercise.
Κάνε κλικ εδώ για να κάνεις την άσκηση.