I did not say that. Your question was "Do these below have the same meaning?" and my response was, basically, yes. Though not specifically stated, I take the sentence to mean that studying now will be of use in the future. Naturally, studying will be of use no matter when it takes place and it's logical to think that the future is when it will be the most useful. Can studying now b
So the sentence 'It will be useful in the future for you to study hard' itself could mean either 'If you study hard in the future, it will be useful' or 'If you study hard now, it will be useful in the future'?