English verb conjugation
MUST CLATTER

Regular verb: clatter - clattered - clattered

Affirmation

Simple form	V-ing form
I must clatter you must clatter he must clatter we must clatter you must clatter they must clatter	I must be clattering you must be clattering he must be clattering we must be clattering you must be clattering they must be clattering
Perfect	V-ing perfect
I must have clattered you must have clattered he must have clattered we must have clattered you must have clattered they must have clattered	I must have been clattering you must have been clattering he must have been clattering we must have been clattering you must have been clattering they must have been clattering

Negation

Simple form	V-ing form
I must not clatter you must not clatter he must not clatter we must not clatter you must not clatter they must not clatter	I must not be clattering you must not be clattering he must not be clattering we must not be clattering you must not be clattering they must not be clattering
Perfect	V-ing perfect
I must not have clattered you must not have clattered he must not have clattered we must not have clattered you must not have clattered they must not have clattered	I must not have been clattering you must not have been clattering he must not have been clattering we must not have been clattering you must not have been clattering they must not have been clattering

Interrogative form

Simple form	V-ing form
must I clatter? must you clatter? must he clatter? must we clatter? must you clatter? must they clatter?	must I be clattering? must you be clattering? must he be clattering? must we be clattering? must you be clattering? must they be clattering?
Perfect	V-ing perfect
must I have clattered? must you have clattered? must he have clattered? must we have clattered? must you have clattered? must they have clattered?	must I have been clattering? must you have been clattering? must he have been clattering? must we have been clattering? must you have been clattering? must they have been clattering?

Interro-negative form

Simple form	V-ing form
must I not clatter? must you not clatter? must he not clatter? must we not clatter? must you not clatter? must they not clatter?	must I not be clattering? must you not be clattering? must he not be clattering? must we not be clattering? must you not be clattering? must they not be clattering?
Perfect	V-ing perfect
must I not have clattered? must you not have clattered? must he not have clattered? must we not have clattered? must you not have clattered? must they not have clattered?	must I not have been clattering? must you not have been clattering? must he not have been clattering? must we not have been clattering? must you not have been clattering? must they not have been clattering?