English verb conjugation
MUST THRUM

Regular verb: thrum - thrumed - thrumed

Affirmation

Simple form	V-ing form
I must thrum you must thrum he must thrum we must thrum you must thrum they must thrum	I must be thruming you must be thruming he 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 he 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 he 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 mustn't thrum you mustn't thrum he mustn't thrum we mustn't thrum you mustn't thrum they mustn't thrum	I mustn't be thruming you mustn't be thruming he mustn't be thruming we mustn't be thruming you mustn't be thruming they mustn't be thruming
Perfect	V-ing perfect
I mustn't have thrumed you mustn't have thrumed he mustn't have thrumed we mustn't have thrumed you mustn't have thrumed they mustn't have thrumed	I mustn't have been thruming you mustn't have been thruming he mustn't have been thruming we mustn't have been thruming you mustn't have been thruming they mustn't have been thruming

Interrogative form

Simple form	V-ing form
must I thrum? must you thrum? must he thrum? must we thrum? must you thrum? must they thrum?	must I be thruming? must you be thruming? must he 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 he 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 he 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
mustn't I thrum? mustn't you thrum? mustn't he thrum? mustn't we thrum? mustn't you thrum? mustn't they thrum?	mustn't I be thruming? mustn't you be thruming? mustn't he be thruming? mustn't we be thruming? mustn't you be thruming? mustn't they be thruming?
Perfect	V-ing perfect
mustn't I have thrumed? mustn't you have thrumed? mustn't he have thrumed? mustn't we have thrumed? mustn't you have thrumed? mustn't they have thrumed?	mustn't I have been thruming? mustn't you have been thruming? mustn't he have been thruming? mustn't we have been thruming? mustn't you have been thruming? mustn't they have been thruming?