You must do your homework.
You mustn't be late for classes.
Ypu should study well.
You should obey your teacher.
You schould behave yourself at the lessons.
You schould wear formal clothes.
You should take part in after-classes activities.
You must do your homework.
You mustn't be late for classes.
Ypu should study well.
You should obey your teacher.
You schould behave yourself at the lessons.
You schould wear formal clothes.
You should take part in after-classes activities.