Affirmative
- I will have been sleeping for two hours by the time my brother gets home because he will get home at midnight
- You will have been sleeping for two hours by the time your brother gets home because he will get home at midnight
- We will have been sleeping for two hours by the time our brother gets home because he will get home at midnight
- They will have been sleeping for two hours by the time their brother gets home because he will get home at midnight