Affirmative:

Subject + Aux.Verb + Been + V-ing + Compl.?

• Carl has been reading this blog for 10 minutes
• I have been studing english for 5 years

Negative:

Subject + Aux.Verb + Not + Been + V-ing + Compl.?

• They haven't been talking for more than a few minutes.
• She hasn't been studying English for very long

Interrogative:

Yes/No Question

Aux.Verb + Subject + Been + V-ing + Compl.?

• Have they been talking for a long time?

      Yes: -They have been

      No: -They haven't been talking 

• Has Mary been waiting long? 

       Yes: -She has been waiting long

        No: -She hasn't been

Inf. Question:

W.H. + Aux.Verb + Subject + Been + V-ing + Compl.?

• Who have been talking for a long time?
• Where has mary been waiting long?