cần giải hộ gấp !!! câu 6 thui ạ

6. He hasn't written to his parents for two months

-> The last time he wrote to his parents was 2 months ago

7. I haven't been able to see them for over a year.

-> It is been over a year since the last time I saw them.

8. It’s years since we decorated this room

-> We haven't decorated this room for years.