must class
Regular verb: class - classed- classed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must class
you must class
she must class
we must class
you must class
they must class 	I must be classing
you must be classing
she must be classing
we must be classing
you must be classing
they must be classing	I must have classed
you must have classed
she must have classed
we must have classed
you must have classed
they must have classed	I must have been classing
you must have been classing
she must have been classing
we must have been classing
you must have been classing
they must have been classing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't class
you mustn't class
she mustn't class
we mustn't class
you mustn't class
they mustn't class 	I mustn't be classing
you mustn't be classing
she mustn't be classing
we mustn't be classing
you mustn't be classing
they mustn't be classing	I mustn't have classed
you mustn't have classed
she mustn't have classed
we mustn't have classed
you mustn't have classed
they mustn't have classed	I mustn't have been classing
you mustn't have been classing
she mustn't have been classing
we mustn't have been classing
you mustn't have been classing
they mustn't have been classing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I class?
must you class?
must she class?
must we class?
must you class?
must they class? 	must I be classing?
must you be classing?
must she be classing?
must we be classing?
must you be classing?
must they be classing? 	must I have classed?
must you have classed?
must she have classed?
must we have classed?
must you have classed?
must they have classed? 	must I have been classing?
must you have been classing?
must she have been classing?
must we have been classing?
must you have been classing?
must they have been classing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I class?
mustn't you class?
mustn't she class?
mustn't we class?
mustn't you class?
mustn't they class? 	mustn't I be classing?
mustn't you be classing?
mustn't she be classing?
mustn't we be classing?
mustn't you be classing?
mustn't they be classing? 	mustn't I have classed?
mustn't you have classed?
mustn't she have classed?
mustn't we have classed?
mustn't you have classed?
mustn't they have classed? 	mustn't I have been classing?
mustn't you have been classing?
mustn't she have been classing?
mustn't we have been classing?
mustn't you have been classing?
mustn't they have been classing?