YOU SAID:
It is I, the coke captian!
INTO JAPANESE
私は、コークスのキャプテンだ!
BACK INTO ENGLISH
I was the captain of the coke!
INTO JAPANESE
私は、コークスのキャプテンだった!
BACK INTO ENGLISH
I was the captain of the coke!
That didn't even make that much sense in English.