English verb conjugation
MUST BREAK

Irregular verb: break - broke - broken

Affirmation

Simple form	V-ing form
I must break you must break he must break we must break you must break they must break	I must be breaking you must be breaking he must be breaking we must be breaking you must be breaking they must be breaking
Perfect	V-ing perfect
I must have broken you must have broken he must have broken we must have broken you must have broken they must have broken	I must have been breaking you must have been breaking he must have been breaking we must have been breaking you must have been breaking they must have been breaking

Negation

Simple form	V-ing form
I mustn't break you mustn't break he mustn't break we mustn't break you mustn't break they mustn't break	I mustn't be breaking you mustn't be breaking he mustn't be breaking we mustn't be breaking you mustn't be breaking they mustn't be breaking
Perfect	V-ing perfect
I mustn't have broken you mustn't have broken he mustn't have broken we mustn't have broken you mustn't have broken they mustn't have broken	I mustn't have been breaking you mustn't have been breaking he mustn't have been breaking we mustn't have been breaking you mustn't have been breaking they mustn't have been breaking

Interrogative form

Simple form	V-ing form
must I break? must you break? must he break? must we break? must you break? must they break?	must I be breaking? must you be breaking? must he be breaking? must we be breaking? must you be breaking? must they be breaking?
Perfect	V-ing perfect
must I have broken? must you have broken? must he have broken? must we have broken? must you have broken? must they have broken?	must I have been breaking? must you have been breaking? must he have been breaking? must we have been breaking? must you have been breaking? must they have been breaking?

Interro-negative form

Simple form	V-ing form
mustn't I break? mustn't you break? mustn't he break? mustn't we break? mustn't you break? mustn't they break?	mustn't I be breaking? mustn't you be breaking? mustn't he be breaking? mustn't we be breaking? mustn't you be breaking? mustn't they be breaking?
Perfect	V-ing perfect
mustn't I have broken? mustn't you have broken? mustn't he have broken? mustn't we have broken? mustn't you have broken? mustn't they have broken?	mustn't I have been breaking? mustn't you have been breaking? mustn't he have been breaking? mustn't we have been breaking? mustn't you have been breaking? mustn't they have been breaking?