YOU SAID:
When I was twelve I peed on my dog
INTO JAPANESE
私が12歳のとき、私は私の犬をおしっこしました
BACK INTO ENGLISH
I peeed my dog when I was 12
INTO JAPANESE
12歳の時に犬をおしっこした
BACK INTO ENGLISH
I peeed my dog when I was 12
Come on, you can do better than that.