English Grammer-Tense, Part 1. Nirjhor

Structure:
Present Indefinite Tense:
Subject + Present form of verb + Object
Present Continuous Tense:
Subject + am\is \are + verb + ing + object
Present Perfect Tense:
Subject + have\ has + Past participle form of verb + Object
Present Perfect Continues Tense:
Subject + have been\ has been + verb + ing + object