YOU SAID:

I don’t even know how butterflies manage to fly

INTO JAPANESE

私は蝶がどうやって飛ぶことができるのかさえ知らない

BACK INTO ENGLISH

I don't even know how butterflies can fly

INTO JAPANESE

私は蝶が飛ぶことができる方法さえ知らない

BACK INTO ENGLISH

I don't even know how butterflies can fly