Q:

He said to me, "I will have been digging the ground for half an hour" 

• 1
  He told me that he would have been digging the ground for half an hour
• 2
  He told me that I would have been digging the ground for half an hour
• 3
  He told me that he will have been digging the ground for half an hour.
• 4
  He told me that I will have been digging the ground for half an hour