Examples:

• Yes, I've been living under a rock.
• What, have you been living under a rock?
• You been living under a rock or what?
• What you been living under a rock?
• Have you been living under a rock?
• I've sort of been living under a rock these days. Hmm.
• Has he been living under a rock?
• Maybe he hasn't been living under a rock for the past five years.
• I guess that means you haven't been living under a rock.
• Have I been living under a rock?