I have been working as teacher since 1998

She has beenliving for two years

1)she has been living in America for two years 2) I have been working as a teacher since 2015 3)He had been studying MBBS since 2017 4) mother has been cooking for three hours 5) father had been reading newspaper for ten minutes

He has been practicing as doctorsince

My father had been reading books for three hours

My mother has been cooking for three hours