1.She has been a teacher for 3 years
2.she has been a teacher since 2002
3.she was a teacher in 2002
4.she will be a teacher next year
5.he has known them for 2 months
6.they have had this car for 5 years
7.I have been living here since 2001
8.I lived here in 2001
9.we have known her for many years