Answer:
My grandparents have lived here since 1962.
My grandparents have lived here for 50 years.
We have stayed at our friends' house for a long time.
Kate has been away for two weeks.
We have been friends since we were children.
Joe and Tina have lived in England for 10 years.
My brother has worked hard since the beginning of February.
I haven't seen Eric since yesterday.
Our friends haven't visited us since Christmas.
My father has had this car for two years.
