English verb conjugation
MUST CLASS

Regular verb: class - classed - classed

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
I must not class you must not class she must not class we must not class you must not class they must not class	I must not be classing you must not be classing she must not be classing we must not be classing you must not be classing they must not be classing
Perfect	V-ing perfect
I must not have classed you must not have classed she must not have classed we must not have classed you must not have classed they must not have classed	I must not have been classing you must not have been classing she must not have been classing we must not have been classing you must not have been classing they must not have been classing

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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
must I not class? must you not class? must she not class? must we not class? must you not class? must they not class?	must I not be classing? must you not be classing? must she not be classing? must we not be classing? must you not be classing? must they not be classing?
Perfect	V-ing perfect
must I not have classed? must you not have classed? must she not have classed? must we not have classed? must you not have classed? must they not have classed?	must I not have been classing? must you not have been classing? must she not have been classing? must we not have been classing? must you not have been classing? must they not have been classing?