Hello, Baraha The Past Simple tense here is used to express not past time, but a hypothetical situation. It's not in the future, because it not clear at all whether you will study more or not. You can use the Future Simple in order to express this thought in a more compelling way: «If I study more I will be smarter» (and I think I have to) Compare: «If I studied more I would be smarter» (but I don't think I can collect enough courage to do it) Anton
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