YOU SAID:
did you go to jeff's birthday party?
INTO JAPANESE
ジェフの誕生日パーティーに行きましたか?
BACK INTO ENGLISH
Did you go to Jeff's birthday party?
INTO JAPANESE
ジェフの誕生日パーティーに行きましたか。
BACK INTO ENGLISH
Did you go to Jeff's birthday party?
That didn't even make that much sense in English.