Two things you should do and two things you shouldn't do when you have a job interview, One thing you should do when you have a headache, Two things you must do if you've been invited to a formal party, Three things good students (like you) have to do to improve their English, Two things you shouldn't do when you have the flu, Two things a teacher has to do before class, Two things you must do and two things you mustn't do before driving, Three things you don't have to do on the weekend.

Modals of obligation should/ have to/ must

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