Leeter to my college principle seeking forgive for going home for illness without his permission and not able to attend a class.
Welcome to Using English.
Write your letter and post it here.
When I see you've done that, I will move this thread to the writing section.
Someone will take a look.
Make sure you check your spelling carefully.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.