YOU SAID:
I ate all the pizza i could eat
INTO JAPANESE
私は食べることができるすべてのピザを食べました
BACK INTO ENGLISH
I ate all the pizza you can eat
INTO JAPANESE
私は食べることができるすべてのピザを食べた
BACK INTO ENGLISH
I ate all the pizza you can eat
That didn't even make that much sense in English.