In none of these sentences does the hyphen correctly divide a word, since barber is always one word. Hyphens are used to to separate two difference words that are joined.
I guess he's not letting you use the car becasue he doesn't trust or know your friends and can't guarantee your safety with them.
"You're 16 years old, you have your driver's license, and you want to take some friends to a movie. You ask your father if you can borrow the car, but he refuses and puts his keys in his pocket. But he let you use the car several days ago."
I believe you should carry out your idea, principal. It would be easier for everyone if it was just sent by email. Emails are quick and more convenient while writing a note would take longer due to spelling mistakes, bad handwriting, etc.
