但其實我並非完全沒有聽過、學過古典音樂，以前國小、國中、高中的時候至少

但其實我並非完全沒有聽過、學過古典音樂，以前國小、國中、高中的時候至少音樂課有上過一些古典樂。只是那些其實我已經忘得差不多了。

結果 (英文) 1:

But in fact I am not entirely heard, studied classical music, before a small country, the country, the high school music class has at least on some classical music. Only those I have actually forgotten almost.

結果 (英文) 2:

But in fact, I have not completely listened to, learned classical music, before the country, the country, high school at least some music class had some classical music. It's just that I've just forgotten about it.

結果 (英文) 3:

But in fact, I haven't heard or learned classical music at all. In the past, when I was in elementary school, junior high school or senior high school, at least I had some classical music in my music class. But in fact, I have almost forgotten those.