Definition : The past perfect continuous corresponds to the present perfect continuous, but with reference to a time earlier than 'before now'. As with the present perfect continuous, we are more interested in the process . Unlike the present perfect continuous, which indicates an action that began in the past and continued up to the present, the past perfect continuous is a verb tense that indicates something that began in the past, continued in the past, and also ended at a defined point in the past. 1. Verbal form, the formula are : (+) Subject + had been + Verb Ing + Object Example : I had been doing the homework (-) Subject +had not (hadn’t)+ been + Verb Ing + Object Example : they had not been doing their homework (?) Had + S
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