English verb conjugation
MUST SNOWBALL

Regular verb: snowball - snowballed - snowballed

Affirmation

Simple form	V-ing form
I must snowball you must snowball she must snowball we must snowball you must snowball they must snowball	I must be snowballing you must be snowballing she must be snowballing we must be snowballing you must be snowballing they must be snowballing
Perfect	V-ing perfect
I must have snowballed you must have snowballed she must have snowballed we must have snowballed you must have snowballed they must have snowballed	I must have been snowballing you must have been snowballing she must have been snowballing we must have been snowballing you must have been snowballing they must have been snowballing

Negation

Simple form	V-ing form
I mustn't snowball you mustn't snowball she mustn't snowball we mustn't snowball you mustn't snowball they mustn't snowball	I mustn't be snowballing you mustn't be snowballing she mustn't be snowballing we mustn't be snowballing you mustn't be snowballing they mustn't be snowballing
Perfect	V-ing perfect
I mustn't have snowballed you mustn't have snowballed she mustn't have snowballed we mustn't have snowballed you mustn't have snowballed they mustn't have snowballed	I mustn't have been snowballing you mustn't have been snowballing she mustn't have been snowballing we mustn't have been snowballing you mustn't have been snowballing they mustn't have been snowballing

Interrogative form

Simple form	V-ing form
must I snowball? must you snowball? must she snowball? must we snowball? must you snowball? must they snowball?	must I be snowballing? must you be snowballing? must she be snowballing? must we be snowballing? must you be snowballing? must they be snowballing?
Perfect	V-ing perfect
must I have snowballed? must you have snowballed? must she have snowballed? must we have snowballed? must you have snowballed? must they have snowballed?	must I have been snowballing? must you have been snowballing? must she have been snowballing? must we have been snowballing? must you have been snowballing? must they have been snowballing?

Interro-negative form

Simple form	V-ing form
mustn't I snowball? mustn't you snowball? mustn't she snowball? mustn't we snowball? mustn't you snowball? mustn't they snowball?	mustn't I be snowballing? mustn't you be snowballing? mustn't she be snowballing? mustn't we be snowballing? mustn't you be snowballing? mustn't they be snowballing?
Perfect	V-ing perfect
mustn't I have snowballed? mustn't you have snowballed? mustn't she have snowballed? mustn't we have snowballed? mustn't you have snowballed? mustn't they have snowballed?	mustn't I have been snowballing? mustn't you have been snowballing? mustn't she have been snowballing? mustn't we have been snowballing? mustn't you have been snowballing? mustn't they have been snowballing?