YOU SAID:
I'm a green and fast potato
INTO JAPANESE
私は緑色で速いジャガイモです
BACK INTO ENGLISH
I'm a green, fast potato.
INTO JAPANESE
私は緑色の速いジャガイモです。
BACK INTO ENGLISH
I am a green fast potato.
INTO JAPANESE
私は緑色のファストポテトです。
BACK INTO ENGLISH
I am a green fast potato.
Come on, you can do better than that.