Students play Kahoot and figure out which of the sentences match the pictures.
I tell students "must" is a stronger version of have to and that it usually carries a consequence.
Feel free to duplicate and add your own questions to it!
kahoot! link: https://create.kahoot.it/share/have-to-must-not/3826e550-1598-4f43-affa-34a81aaac940
Nice!
But the one about a chicken needs to be fixed.
Not "MUST NOT". It "HAS TO" in order to be fried and sold, as pointed out by a student.
I think the idea is that the chicken will be eaten if it goes to KFC. I agree it's a bit vague though.