English verb conjugation
MUST SNOWBALL

Regular verb: snowball - snowballed - snowballed

Affirmation

Simple form	V-ing form
I must snowball you must snowball he must snowball we must snowball you must snowball they must snowball	I must be snowballing you must be snowballing he 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 he 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 he 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 he 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 he 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 he 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 he 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 he snowball? must we snowball? must you snowball? must they snowball?	must I be snowballing? must you be snowballing? must he 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 he 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 he 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 he 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 he 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 he 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 he have been snowballing? mustn't we have been snowballing? mustn't you have been snowballing? mustn't they have been snowballing?