I haven't seen you for such a long time. Where had you been all these days?
For the last month I have not met you.
--I had been to Bangalore. (Or I had been to my hometown)
Where had you been all these days? I haven't seen you since last Saturday.
--Actually, I had been tied up with my business.
You look tired, are you not well?
--Yes, I am not well.
--No. I am alright.
Did you consult the doctor?
Why don't you consult the doctor?
How is your mother?
--She is okay.
And how is you grandfather?
--He is not well.
He is not doing well.