YOU SAID:
Mushroom cookies were planted in the ground by Jack.
INTO JAPANESE
キノコ クッキーはジャックによって地面に植えた。
BACK INTO ENGLISH
Mushroom cookies are planted in the ground by Jack.
INTO JAPANESE
キノコ クッキーがジャックによって地面に植えられています。
BACK INTO ENGLISH
Mushroom cookies are planted in the ground by Jack.
You've done this before, haven't you.