You _________ play loud music after 9pm. (prohibition)
must not/mustn't
You _____ ____ call them, I'll send them an email. (not necessary)
don't have to
You ________ wear a mask to enter. (obligation)
must/have to
You ______ bring an umbrella, it's going to rain later. (it's a good idea)
should
You __________ walk, I can give you a ride. (not necessary)
don't have to
You _________ spend all your time playing video games. (it's a bad idea)
shouldn't
You ______ go to the gym if you want to get fit. (it's a good idea)
should
She _______ study for your exam tomorrow. (obligation)
has to
You ______ be on time for class.(obligation)
must/have to
You _________ put metal in the microwave. (prohibition)
must not/mustn't
We ____________ bring the teacher an apple, but we can if we want to. (not necessary.)
don't have to
