English verb conjugation
MUST COUNTERMARCH

Regular verb: countermarch - countermarched - countermarched

Affirmation

Simple form	V-ing form
I must countermarch you must countermarch he must countermarch we must countermarch you must countermarch they must countermarch	I must be countermarching you must be countermarching he must be countermarching we must be countermarching you must be countermarching they must be countermarching
Perfect	V-ing perfect
I must have countermarched you must have countermarched he must have countermarched we must have countermarched you must have countermarched they must have countermarched	I must have been countermarching you must have been countermarching he must have been countermarching we must have been countermarching you must have been countermarching they must have been countermarching

Negation

Simple form	V-ing form
I mustn't countermarch you mustn't countermarch he mustn't countermarch we mustn't countermarch you mustn't countermarch they mustn't countermarch	I mustn't be countermarching you mustn't be countermarching he mustn't be countermarching we mustn't be countermarching you mustn't be countermarching they mustn't be countermarching
Perfect	V-ing perfect
I mustn't have countermarched you mustn't have countermarched he mustn't have countermarched we mustn't have countermarched you mustn't have countermarched they mustn't have countermarched	I mustn't have been countermarching you mustn't have been countermarching he mustn't have been countermarching we mustn't have been countermarching you mustn't have been countermarching they mustn't have been countermarching

Interrogative form

Simple form	V-ing form
must I countermarch? must you countermarch? must he countermarch? must we countermarch? must you countermarch? must they countermarch?	must I be countermarching? must you be countermarching? must he be countermarching? must we be countermarching? must you be countermarching? must they be countermarching?
Perfect	V-ing perfect
must I have countermarched? must you have countermarched? must he have countermarched? must we have countermarched? must you have countermarched? must they have countermarched?	must I have been countermarching? must you have been countermarching? must he have been countermarching? must we have been countermarching? must you have been countermarching? must they have been countermarching?

Interro-negative form

Simple form	V-ing form
mustn't I countermarch? mustn't you countermarch? mustn't he countermarch? mustn't we countermarch? mustn't you countermarch? mustn't they countermarch?	mustn't I be countermarching? mustn't you be countermarching? mustn't he be countermarching? mustn't we be countermarching? mustn't you be countermarching? mustn't they be countermarching?
Perfect	V-ing perfect
mustn't I have countermarched? mustn't you have countermarched? mustn't he have countermarched? mustn't we have countermarched? mustn't you have countermarched? mustn't they have countermarched?	mustn't I have been countermarching? mustn't you have been countermarching? mustn't he have been countermarching? mustn't we have been countermarching? mustn't you have been countermarching? mustn't they have been countermarching?