YOU SAID:
Why didn’t you reply to my letters?
INTO JAPANESE
なぜ私の手紙に返事をくれなかったのですか?
BACK INTO ENGLISH
Why didn't you reply to my letter?
INTO JAPANESE
なぜ私の手紙に返事をくれなかったのですか?
BACK INTO ENGLISH
Why didn't you reply to my letter?
That didn't even make that much sense in English.