The Past Perfect tense is used to describe an action that occurred before another action in the past. It is formed using the auxiliary verb "had" + the past participle of the main verb. The Past Perfect tense is used to show that one action was completed before another action started.For example:* I had eaten breakfast before I went to school. (Here, "had eaten" is the Past Perfect tense, indicating that the action of eating breakfast was completed before the action of going to school started.)* She had studied English for three years before she moved to the United States. (Here, "had studied" is the Past Perfect tense, indicating that the action of studying English was completed before the action of moving to the United States started.)Here are 10 examples of the Past Perfect tense in English, Hindi, and Roman Hindi:1. I had finished my homework. - मैंने अपना होमवर्क पूरा कर लिया था। - Main ne apna homework pura kar liya tha.2. She had already eaten dinner. - वह पहले ही डिनर खा चुकी थी। - Vah pehle hi dinner kha chuki thi.3. They had been waiting for hours. - वे घंटों से इंतजार कर रहे थे। - Ve...