Modal verbs.Hello! I'd like to seek explanation on the following examples from a book. These pertain to school rules:
A.
Students MAY bring drinks to school, but we CAN'T drink them during classes.
Students CAN'T come to school by motorcycle.
We MUSTN'T use mobile phones during classes.
We CAN work part-time.
We CAN'T get a driver's license.
We CAN have lunch at the school yard.