YOU SAID:

I left my keys in the car

INTO JAPANESE

鍵を車に置き去りにした

BACK INTO ENGLISH

I left the key in the car.

INTO JAPANESE

部屋に鍵を置いてきた。

BACK INTO ENGLISH

I left the key in the room.

INTO JAPANESE

部屋に鍵を置いてきた。

BACK INTO ENGLISH

I left the key in the room.