YOU SAID:

Once when I was a toddler I pooped on my sister's pillow

INTO JAPANESE

幼児の頃、姉の枕にウンチをしたことがある。

BACK INTO ENGLISH

When I was a toddler, I pooped my sister's pillow.

INTO JAPANESE

幼児の頃、姉の枕にウンチをした。

BACK INTO ENGLISH

When I was a toddler, I pooped my sister's pillow.