How long have you been eating only vegetables?
Have your teachers been teaching French classes at school?
Have your parents been working in that office since 1990?
How long has your boyfriend been doing his hair by himself?
How long has your mother been linving at your place?
Has your sister been doing yoga since she was young?
He's been doing his hair since last month
No, they have been working there since 1999
I've been consuming only healthy food since last year
No, they have teaching German lessons these days
Well, she's been there for 5 months
Yes, she's been doing this since she was 5 years old