YOU SAID:
I like beef but not chicken
INTO JAPANESE
私は牛肉が好きですが、鶏肉は好きではありません
BACK INTO ENGLISH
I like beef, but I don't like chicken
INTO JAPANESE
私は牛肉が好きですが、鶏肉は好きではありません
BACK INTO ENGLISH
I like beef, but I don't like chicken
That didn't even make that much sense in English.