1.1 Form Of Past Perfect ContinuousTense
HAD + BEEN VING
I had been running for an hour.
I had not been running for an hour.
Had you been running for an hour?
1.2 Use Of Past Perfect Continuous Tense
a) The Past Perfect Continuous geçmişte başka bir eylemden önce gerçekleşmekte olan eylemin sürecinden bahsederken kullanılır.