must have to | Baamboozle - Baamboozle | The Most Fun Classroom Games!

must have to

Help

You............open this door! There is a dog!

You mustn't open this door! There is a dog!

You.............help me if you don't want to.

You don't have to help me if you don't want to.

The match is free to watch. We................buy the tickets.

The match is free to watch. We don't have to buy the tickets.

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