YOU SAID:
How could i ever know
INTO JAPANESE
どうやって知ることができたんだろう
BACK INTO ENGLISH
how could i know
INTO JAPANESE
どうやって知ることができたでしょうか
BACK INTO ENGLISH
How could I know?
INTO JAPANESE
どうやって知ることができたのでしょうか?
BACK INTO ENGLISH
How could I know?
That didn't even make that much sense in English.