YOU SAID:
Is the cat done eating
INTO JAPANESE
猫は食べ終わったか
BACK INTO ENGLISH
Did the cat have eaten
INTO JAPANESE
猫は食べましたか
BACK INTO ENGLISH
Did you eat the cat
INTO JAPANESE
猫を食べましたか
BACK INTO ENGLISH
Did you eat a cat
INTO JAPANESE
猫を食べましたか
BACK INTO ENGLISH
Did you eat a cat
That didn't even make that much sense in English.