English verb conjugation
MUST THRUM

Regular verb: thrum - thrumed - thrumed

Affirmation

Simple form	V-ing form
I must thrum you must thrum she must thrum we must thrum you must thrum they must thrum	I must be thruming you must be thruming she must be thruming we must be thruming you must be thruming they must be thruming
Perfect	V-ing perfect
I must have thrumed you must have thrumed she must have thrumed we must have thrumed you must have thrumed they must have thrumed	I must have been thruming you must have been thruming she must have been thruming we must have been thruming you must have been thruming they must have been thruming

Negation

Simple form	V-ing form
I must not thrum you must not thrum she must not thrum we must not thrum you must not thrum they must not thrum	I must not be thruming you must not be thruming she must not be thruming we must not be thruming you must not be thruming they must not be thruming
Perfect	V-ing perfect
I must not have thrumed you must not have thrumed she must not have thrumed we must not have thrumed you must not have thrumed they must not have thrumed	I must not have been thruming you must not have been thruming she must not have been thruming we must not have been thruming you must not have been thruming they must not have been thruming

Interrogative form

Simple form	V-ing form
must I thrum? must you thrum? must she thrum? must we thrum? must you thrum? must they thrum?	must I be thruming? must you be thruming? must she be thruming? must we be thruming? must you be thruming? must they be thruming?
Perfect	V-ing perfect
must I have thrumed? must you have thrumed? must she have thrumed? must we have thrumed? must you have thrumed? must they have thrumed?	must I have been thruming? must you have been thruming? must she have been thruming? must we have been thruming? must you have been thruming? must they have been thruming?

Interro-negative form

Simple form	V-ing form
must I not thrum? must you not thrum? must she not thrum? must we not thrum? must you not thrum? must they not thrum?	must I not be thruming? must you not be thruming? must she not be thruming? must we not be thruming? must you not be thruming? must they not be thruming?
Perfect	V-ing perfect
must I not have thrumed? must you not have thrumed? must she not have thrumed? must we not have thrumed? must you not have thrumed? must they not have thrumed?	must I not have been thruming? must you not have been thruming? must she not have been thruming? must we not have been thruming? must you not have been thruming? must they not have been thruming?