Must/mustn't/have to/don't have to

the past of "don't have to"

CORRECT THE MISTAKE: "The skatepark is free = we haven't to pay anything."

the past of "have to"

CORRECT THE MISTAKE: "We mustn't bring food to the party - Jake's mum is making everything."

At our school we __________ wear a uniform. (not necessary)

CORRECT THE MISTAKE: "You must to bring your pencil case to the next lesson."

You __________ cross the roads without looking. It’s dangerous.

At a restaurant you _________ pay the bill but you __________ eat everything.

Doctors sometimes ________ to work at the weekend.

CORRECT THE MISTAKE: Dad says I mustn't help him on Saturday, so I can come to your house.

CORRECT THE MISTAKE: When I was younger, I must visit my grandparents often.