The Past Perfect Continuous tense is a complex verb form used to describe an action that started before a specific point in the past and continued up to that point. It emphasizes the duration of the action, highlighting that it was ongoing and had a connection to the present or another past action. To form the Past Perfect Continuous tense, we use the auxiliary verb "had" + "been" + the present participle of the main verb.For example:- I had been studying English for three years before I moved to the United States.- By the time she arrived, they had been waiting for two hours.This tense is particularly useful for showing cause and effect, contrasting actions, or indicating the duration of an action before another past action occurred.Here are 10 examples of the Past Perfect Continuous tense in English, Hindi, and Roman Hindi:1. English: I had been working on the project for six months before it was cancelled.Hindi: मैंने परियोजना पर छह महीनों से काम कर रहा था जब तक वह रद्द नहीं हो गई।Roman Hindi: Mainne pariyojana par chhah mahino se kaam kar raha tha jab tak vah radd nahin hui.2. English: They had been traveling for hours before they...