Prefix un and re

sad

I have to ______________ my shoelaces before I go to gym.

What does 'un' mean when you add it to the beginning of a word?

Mom had to _____________________ the candles because they blew out.

I had to _____________________ my suitcase when I got to the hotel.

Mr. Hokenson had to __________________ the door to the school before he went in.

Mom had to ______________________ my room because I colored on the walls.

do over

Add 'un' or 're' to make the sentence right: I had to ___write my sentence and make it neat.

not equal