To make questions in the Past Perfect Continuous, use:

 

Had + subject + been + the “-ing” form of the verb

 

Singular	Plural
Had I been skating? Had you been skating? Had he/she/it been skating?	Had we been skating? Had you been skating? Had they been skating?

 

 

Had it been snowing for a long time before you went for a walk?

 

Had you been playing with Timothy when mom called you for dinner?

 

Had she been studying Spanish for a long time by the time she went to Madrid?  

 

Note: in short positive answers to the Past Perfect Continuous questions we use only full forms of had. In short negative answers we can also use short forms of had.

 

 

Had you been playing football?

Yes, I had (No, I hadn’t).

 

Had she been watching TV at that moment?

Yes, she had (No, she hadn’t).