YOU SAID:
when was the last time you went to the toilet
INTO JAPANESE
最後にトイレに行ったのはいつですか
BACK INTO ENGLISH
When did you last go to the bathroom
INTO JAPANESE
あなたは最後にトイレに行きましたか
BACK INTO ENGLISH
Did you finally go to the bathroom
INTO JAPANESE
ついにトイレに行きましたか
BACK INTO ENGLISH
Did you finally go to the bathroom
That didn't even make that much sense in English.