1 She has had that laptop since last Christmas.

2 They have lived in London since 2003.

she bought that laptop last christmas
=> She has had that laptop since last Christmas.
they moved to london in 2003
=> They have lived in London since 2003.

she bought that laptop last christmas
=>She has had that laptop since last Christmas.
they moved to london in 2003
=>They have lived in London since 2003.