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A. Affirmative: Subject + had + been + ing with 1st
form of Verb + object + since/for + time. B. Negative: Subject + had + not + been + ing with 1st
form of Verb + object + since/for + time. C. Interrogative: Had + subject + been + ing with 1st
form of Verb + object + since/for + time? |
Condition
involving this tense:-
1. It
indicates an action that goes on at a point of time in the past:
a. I had been studying in this school for six
years.
b. He had been working hard for ten years.
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