YOU SAID:
How could you not know?!
INTO JAPANESE
どうして分からなかったのですか?
BACK INTO ENGLISH
How could you not understand?
INTO JAPANESE
どうして理解できなかったのでしょうか?
BACK INTO ENGLISH
How could I not understand?
INTO JAPANESE
どうして理解できなかったのでしょうか?
BACK INTO ENGLISH
How come you didn't understand?
INTO JAPANESE
どうして理解できなかったのですか?
BACK INTO ENGLISH
How could you not understand?
INTO JAPANESE
どうして理解できなかったのでしょうか?
BACK INTO ENGLISH
How could I not understand?
INTO JAPANESE
どうして理解できなかったのでしょうか?
BACK INTO ENGLISH
How could I not understand?
That didn't even make that much sense in English.