YOU SAID:

they steal the paintings

INTO JAPANESE

彼らは絵を盗む

BACK INTO ENGLISH

They steal the paintings.

INTO JAPANESE

彼らは絵を盗む。

BACK INTO ENGLISH

They steal the painting.

INTO JAPANESE

彼らはその絵を盗む。

BACK INTO ENGLISH

They steal the picture.

INTO JAPANESE

写真を盗まれる

BACK INTO ENGLISH

They're gonna steal my pictures.

INTO JAPANESE

彼らは私の写真を盗むつもりだ。

BACK INTO ENGLISH

They're going to steal my picture.

INTO JAPANESE

彼らは私の写真を盗むつもりだ。

BACK INTO ENGLISH

They're going to steal my picture.