John and Jane were two neighbuors who know each other very well. They live in the same town. (Put this in the past tense)
1
John and Jane were two neighbours who have known each other very well. They lived in the same town.
2
John and Jane were two neighbours who had known each other very well. They were living in the same town.
3
John and Jane were two neighbours who knew each other very well. They lived in the same town.
4
John and Jane have been two neighbours who knew each other very well. They were living in the same town.