Hi, The normal approach for English learners is simply to memorize te form of ezch tense. Explanations as to how these forms evolved are of interest mainly to students of the history of the English language and of English linguistics. In other words, it's an advanced topic.
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umarkhando we have to memorize the tenses and its rules or is there any explanation behind it.If you are referring to the forms themselves, I don't know any other way of learning them except to memorize them. Your textbooks should be giving you the information necessary to see the pattern of the forms. Here's a sample of parts of the conjugation of "take".