Past Perfect Continuous tense utilizes the auxiliary phrase "had been" followed by the verb in present participle form ("waiting").
I ____ for the postman for long? (According to the Past Perfect Continuous Tense).
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Question context
This question is part of 🗣️ Verbal Ability within the broader 🧠 Aptitude Mastery subject and appears in the Anti Narcotics Force (ANF) preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.