English verb conjugation
MUST CHATTER

Regular verb: chatter - chattered - chattered

Affirmation

Simple form	V-ing form
I must chatter you must chatter he must chatter we must chatter you must chatter they must chatter	I must be chattering you must be chattering he must be chattering we must be chattering you must be chattering they must be chattering
Perfect	V-ing perfect
I must have chattered you must have chattered he must have chattered we must have chattered you must have chattered they must have chattered	I must have been chattering you must have been chattering he must have been chattering we must have been chattering you must have been chattering they must have been chattering

Negation

Simple form	V-ing form
I must not chatter you must not chatter he must not chatter we must not chatter you must not chatter they must not chatter	I must not be chattering you must not be chattering he must not be chattering we must not be chattering you must not be chattering they must not be chattering
Perfect	V-ing perfect
I must not have chattered you must not have chattered he must not have chattered we must not have chattered you must not have chattered they must not have chattered	I must not have been chattering you must not have been chattering he must not have been chattering we must not have been chattering you must not have been chattering they must not have been chattering

Interrogative form

Simple form	V-ing form
must I chatter? must you chatter? must he chatter? must we chatter? must you chatter? must they chatter?	must I be chattering? must you be chattering? must he be chattering? must we be chattering? must you be chattering? must they be chattering?
Perfect	V-ing perfect
must I have chattered? must you have chattered? must he have chattered? must we have chattered? must you have chattered? must they have chattered?	must I have been chattering? must you have been chattering? must he have been chattering? must we have been chattering? must you have been chattering? must they have been chattering?

Interro-negative form

Simple form	V-ing form
must I not chatter? must you not chatter? must he not chatter? must we not chatter? must you not chatter? must they not chatter?	must I not be chattering? must you not be chattering? must he not be chattering? must we not be chattering? must you not be chattering? must they not be chattering?
Perfect	V-ing perfect
must I not have chattered? must you not have chattered? must he not have chattered? must we not have chattered? must you not have chattered? must they not have chattered?	must I not have been chattering? must you not have been chattering? must he not have been chattering? must we not have been chattering? must you not have been chattering? must they not have been chattering?