YOU SAID:
you had swear me when i swear you
INTO JAPANESE
私はあなたを誓うときあなたは私を誓っていた
BACK INTO ENGLISH
You swore me when I swear you
INTO JAPANESE
私があなたを誓うときあなたは私を誓った
BACK INTO ENGLISH
You swore me when I swear you
That didn't even make that much sense in English.