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 must not stop you must not stop he must not stop we must not stop you must not stop they must not stop	I must not be stopping you must not be stopping he must not be stopping we must not be stopping you must not be stopping they must not be stopping
Perfect	V-ing perfect
I must not have stopped you must not have stopped he must not have stopped we must not have stopped you must not have stopped they must not have stopped	I must not have been stopping you must not have been stopping he must not have been stopping we must not have been stopping you must not have been stopping they must not 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
must I not stop? must you not stop? must he not stop? must we not stop? must you not stop? must they not stop?	must I not be stopping? must you not be stopping? must he not be stopping? must we not be stopping? must you not be stopping? must they not be stopping?
Perfect	V-ing perfect
must I not have stopped? must you not have stopped? must he not have stopped? must we not have stopped? must you not have stopped? must they not have stopped?	must I not have been stopping? must you not have been stopping? must he not have been stopping? must we not have been stopping? must you not have been stopping? must they not have been stopping?