YOU SAID:
if i eated soap, no i didn't, because i did
INTO JAPANESE
石鹸を食べたら、いや、食べなかった。
BACK INTO ENGLISH
When I ate soap, no, I didn't.
INTO JAPANESE
私が石鹸を食べたとき、いや、私はしませんでした。
BACK INTO ENGLISH
When I ate soap, no, I didn't.
That didn't even make that much sense in English.