We must wear our school uniform.
We mustn’t cheat in a test.
You must do your homework.
You mustn’t be late for class.
You must tidy up your room.
We mustn’t bite nails.
‘Must’ is used to talk about rules. ‘Must not’ or ‘mustn’t’ is used for the negative.
Parents must take care of their kids.
You mustn’t shout in the library.
You must be home on time.
They must not forget their school bags.
You mustn’t turn the music too loud.
The main verb is used without ‘to’.
You must help in the house.
We mustn’t make a mess.
We mustn’t smoke.
We must be careful while using electrical appliances.
We say… We don’t say…
We must look both ways when crossing a road. (NOT We must to look both ways when crossing a road.)
Children must respect their elders. (NOT Children must respecting their elders.)
You mustn’t run in class. (NOT You mustn’t to run in class.)