Ответ:

1 we have known aziz since 2009

2 My grandmother has lived here for thirty years

3 have you been in this class for a long time?

4 My little brother has had a bike since September

5 she hasn't worked in that shop since last summer

6 they haven't seen Jennifer for six months

7 my grandfather has worked as a professional singer for about five decade

8 Ruth hasn't eaten meat or fish since she was eight years old. she is a vegetarian