YOU SAID:
My fat cat has eaten all of my lasagna
INTO JAPANESE
私の太った猫が私のラザニアを全部食べてしまいました
BACK INTO ENGLISH
my fat cat ate all my lasagna
INTO JAPANESE
私の太った猫は私のラザニアをすべて食べました
BACK INTO ENGLISH
my fat cat ate all my lasagna
That didn't even make that much sense in English.