Hello, Himanshu - and welcome to English Forums. Your question is quite vague, and I don't know what your problem is unless you can give us some specific examples that trouble you. I can list these, though: Simple present tense: I go, he goes.
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Anonymoushe is working.That is a present continuous (present progressive) , using 'be' + the present participle verb form.
AnonymousWorking in the USA is better.That is the present participle verb form used as a noun.