English verb conjugation
MUST DRUM

Regular verb: drum - drummed - drummed

Affirmation

Simple form	V-ing form
I must drum you must drum she must drum we must drum you must drum they must drum	I must be drumming you must be drumming she must be drumming we must be drumming you must be drumming they must be drumming
Perfect	V-ing perfect
I must have drummed you must have drummed she must have drummed we must have drummed you must have drummed they must have drummed	I must have been drumming you must have been drumming she must have been drumming we must have been drumming you must have been drumming they must have been drumming

Negation

Simple form	V-ing form
I mustn't drum you mustn't drum she mustn't drum we mustn't drum you mustn't drum they mustn't drum	I mustn't be drumming you mustn't be drumming she mustn't be drumming we mustn't be drumming you mustn't be drumming they mustn't be drumming
Perfect	V-ing perfect
I mustn't have drummed you mustn't have drummed she mustn't have drummed we mustn't have drummed you mustn't have drummed they mustn't have drummed	I mustn't have been drumming you mustn't have been drumming she mustn't have been drumming we mustn't have been drumming you mustn't have been drumming they mustn't have been drumming

Interrogative form

Simple form	V-ing form
must I drum? must you drum? must she drum? must we drum? must you drum? must they drum?	must I be drumming? must you be drumming? must she be drumming? must we be drumming? must you be drumming? must they be drumming?
Perfect	V-ing perfect
must I have drummed? must you have drummed? must she have drummed? must we have drummed? must you have drummed? must they have drummed?	must I have been drumming? must you have been drumming? must she have been drumming? must we have been drumming? must you have been drumming? must they have been drumming?

Interro-negative form

Simple form	V-ing form
mustn't I drum? mustn't you drum? mustn't she drum? mustn't we drum? mustn't you drum? mustn't they drum?	mustn't I be drumming? mustn't you be drumming? mustn't she be drumming? mustn't we be drumming? mustn't you be drumming? mustn't they be drumming?
Perfect	V-ing perfect
mustn't I have drummed? mustn't you have drummed? mustn't she have drummed? mustn't we have drummed? mustn't you have drummed? mustn't they have drummed?	mustn't I have been drumming? mustn't you have been drumming? mustn't she have been drumming? mustn't we have been drumming? mustn't you have been drumming? mustn't they have been drumming?