YOU SAID:
I wish i knew how to swim
INTO JAPANESE
泳ぎ方を知っていればいいのに
BACK INTO ENGLISH
I should have known how to swim.
INTO JAPANESE
私は泳ぎ方を知っていたはずだ。
BACK INTO ENGLISH
I should have known how to swim.
That didn't even make that much sense in English.