English verb conjugation
MUST STOP

Regular verb: stop - stopped - stopped

Affirmation

Simple form	V-ing form
I must stop you must stop he must stop we must stop you must stop they must stop	I must be stopping you must be stopping he must be stopping we must be stopping you must be stopping they must be stopping
Perfect	V-ing perfect
I must have stopped you must have stopped he must have stopped we must have stopped you must have stopped they must have stopped	I must have been stopping you must have been stopping he must have been stopping we must have been stopping you must have been stopping they must have been stopping

Negation

Simple form	V-ing form
I mustn't stop you mustn't stop he mustn't stop we mustn't stop you mustn't stop they mustn't stop	I mustn't be stopping you mustn't be stopping he mustn't be stopping we mustn't be stopping you mustn't be stopping they mustn't be stopping
Perfect	V-ing perfect
I mustn't have stopped you mustn't have stopped he mustn't have stopped we mustn't have stopped you mustn't have stopped they mustn't have stopped	I mustn't have been stopping you mustn't have been stopping he mustn't have been stopping we mustn't have been stopping you mustn't have been stopping they mustn't have been stopping

Interrogative form

Simple form	V-ing form
must I stop? must you stop? must he stop? must we stop? must you stop? must they stop?	must I be stopping? must you be stopping? must he be stopping? must we be stopping? must you be stopping? must they be stopping?
Perfect	V-ing perfect
must I have stopped? must you have stopped? must he have stopped? must we have stopped? must you have stopped? must they have stopped?	must I have been stopping? must you have been stopping? must he have been stopping? must we have been stopping? must you have been stopping? must they have been stopping?

Interro-negative form

Simple form	V-ing form
mustn't I stop? mustn't you stop? mustn't he stop? mustn't we stop? mustn't you stop? mustn't they stop?	mustn't I be stopping? mustn't you be stopping? mustn't he be stopping? mustn't we be stopping? mustn't you be stopping? mustn't they be stopping?
Perfect	V-ing perfect
mustn't I have stopped? mustn't you have stopped? mustn't he have stopped? mustn't we have stopped? mustn't you have stopped? mustn't they have stopped?	mustn't I have been stopping? mustn't you have been stopping? mustn't he have been stopping? mustn't we have been stopping? mustn't you have been stopping? mustn't they have been stopping?