Por que o certo é If I were ao invés de If I was - English Experts

Oi, pessoal Eu tenho uma duvida, ninguém consegue me responder e eu também não consigo descobrir. I was - past simple, coisa simples de se entender. If I were - Por quê? Não deveria ser If I was? Eu já li isso em livros, e eh muito comum de se ouvir..

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Highlight, take notes, and search in the book In this edition, page numbers are just like the physical edition

Literary Theory: A Very Short Introduction

Highlight, take notes, and search in the book In this edition, page numbers are just like the physical edition

Literary Theory: A Very Short Introduction

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Por que o certo é If I were ao invés de If I was - English Experts

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If I Was” vs. “If I Were”: Which One Is Correct?