YOU SAID:

I left m dog and forgot

INTO JAPANESE

私は左 m 犬と忘れて

BACK INTO ENGLISH

I forgot with the left m dog

INTO JAPANESE

左 m 犬を忘れた

BACK INTO ENGLISH

Forget the dog left m

INTO JAPANESE

犬の左 m を忘れてください。

BACK INTO ENGLISH

Forget the dog left m.

INTO JAPANESE

犬の左 m を忘れます。

BACK INTO ENGLISH

Forget the dog left m.