The tenses that confuse students the most are Present Perfect Continuous & Past Perfect Continuous tenses. How to use have been, has been and had been correctly always troubles students and they make some common English grammar mistakes. In this English lesson in Hindi, you will learn English Grammar Tenses with the example sentences, such as, How to use subject he, she, it, they, plural nouns and singular nouns with have, has and had. The English Grammar Concept is explained with the help of easy to understand diagrams and plenty of examples clear grammar doubts.