YOU SAID:
A bird can fly but a fly cant bird
INTO JAPANESE
鳥は飛べるが飛べない鳥
BACK INTO ENGLISH
Birds can fly but cannot fly
INTO JAPANESE
鳥は飛ぶことはできるが飛べない
BACK INTO ENGLISH
Birds can fly but not
INTO JAPANESE
鳥は飛べますが、飛べません
BACK INTO ENGLISH
Birds can fly, but not
INTO JAPANESE
鳥は飛べますが、飛べません
BACK INTO ENGLISH
Birds can fly, but not
That didn't even make that much sense in English.