YOU SAID:

I wish I knew how to fly a helicopter

INTO JAPANESE

私はヘリコプターを飛ばす方法を知っていればいいのに

BACK INTO ENGLISH

I should have known how to fly a helicopter.

INTO JAPANESE

私はヘリコプターを飛ばす方法を知っていたはずです。

BACK INTO ENGLISH

I should have known how to fly a helicopter.