1. My cousin's best mate can play the guitar well. → He said that his cousin's best mate could played guitar well.
2. I met my cousin's best mate at a football match. → He said that he had met his cousin's best mate at a football match.
3. My colleague lives next door to my neighbor. → He said that his colleague lived next door to his neighbor.
4. My colleague will get married on day. → She said that her colleague would get married on day.
5. Our flatmate is having bath. → They said that their flatmate was having bath.
6. Our sister-in-law has been together with our flatmate for a month. → They said that their sister-in-law had been together with their flatmate for a month.