Вы можете сказать, как долго Дэвид: 1) lived here? for

1) жил тут?

David has lived here for 5 years (3 months).

David has lived here since 1988 (Monday).

2) был тут?

David has been here for 3 days (a week).

David has been here since May (Tuesday).

3) знает их?

David has known them for 3 years (2 weeks).

David has known them since 1991 (last Friday).

4) владеет ими?

David has had them for 2 days (a month, ten years, years).