bad jokes

during an english lesson this conversation took place between a teacher and a student
teacher:what is a verb?
student:a verb is a valve found in a bicycle
teacher:are u mad
student:it is a question sir
teacher:dont be stupid
student:its an advice sir
teacher:stop dat nonsense
student:it is a command sir
teacher:u are an idiot
student:it is an insult sir
teacher:get out of my class
student:it is an order sir
teacher:oh goodness!what a boy
student:it is an exclamation sir
teacher:may god have mercy on you
student:it is a prayer sir