You ( can / can't ) park here! It's private parking. You ( can / can't ) park at the public parking on Main Street.
can't / can
My Mum is very busy because she ( has to / doesn't have to ) work full time.
has to
I ( can / can't ) unlock the door, because I don't have the keys!
can't
Do you have to take out the rubbish?
Yes, I do. / No, I don't.
