English verb conjugation
MUST FROGMARCH

Regular verb: frogmarch - frogmarched - frogmarched

Affirmation

Simple form	V-ing form
I must frogmarch you must frogmarch he must frogmarch we must frogmarch you must frogmarch they must frogmarch	I must be frogmarching you must be frogmarching he must be frogmarching we must be frogmarching you must be frogmarching they must be frogmarching
Perfect	V-ing perfect
I must have frogmarched you must have frogmarched he must have frogmarched we must have frogmarched you must have frogmarched they must have frogmarched	I must have been frogmarching you must have been frogmarching he must have been frogmarching we must have been frogmarching you must have been frogmarching they must have been frogmarching

Negation

Simple form	V-ing form
I must not frogmarch you must not frogmarch he must not frogmarch we must not frogmarch you must not frogmarch they must not frogmarch	I must not be frogmarching you must not be frogmarching he must not be frogmarching we must not be frogmarching you must not be frogmarching they must not be frogmarching
Perfect	V-ing perfect
I must not have frogmarched you must not have frogmarched he must not have frogmarched we must not have frogmarched you must not have frogmarched they must not have frogmarched	I must not have been frogmarching you must not have been frogmarching he must not have been frogmarching we must not have been frogmarching you must not have been frogmarching they must not have been frogmarching

Interrogative form

Simple form	V-ing form
must I frogmarch? must you frogmarch? must he frogmarch? must we frogmarch? must you frogmarch? must they frogmarch?	must I be frogmarching? must you be frogmarching? must he be frogmarching? must we be frogmarching? must you be frogmarching? must they be frogmarching?
Perfect	V-ing perfect
must I have frogmarched? must you have frogmarched? must he have frogmarched? must we have frogmarched? must you have frogmarched? must they have frogmarched?	must I have been frogmarching? must you have been frogmarching? must he have been frogmarching? must we have been frogmarching? must you have been frogmarching? must they have been frogmarching?

Interro-negative form

Simple form	V-ing form
must I not frogmarch? must you not frogmarch? must he not frogmarch? must we not frogmarch? must you not frogmarch? must they not frogmarch?	must I not be frogmarching? must you not be frogmarching? must he not be frogmarching? must we not be frogmarching? must you not be frogmarching? must they not be frogmarching?
Perfect	V-ing perfect
must I not have frogmarched? must you not have frogmarched? must he not have frogmarched? must we not have frogmarched? must you not have frogmarched? must they not have frogmarched?	must I not have been frogmarching? must you not have been frogmarching? must he not have been frogmarching? must we not have been frogmarching? must you not have been frogmarching? must they not have been frogmarching?