English verb conjugation
MUST CALLUS

Regular verb: callus - callused - callused

Affirmation

Simple form	V-ing form
I must callus you must callus he must callus we must callus you must callus they must callus	I must be callusing you must be callusing he must be callusing we must be callusing you must be callusing they must be callusing
Perfect	V-ing perfect
I must have callused you must have callused he must have callused we must have callused you must have callused they must have callused	I must have been callusing you must have been callusing he must have been callusing we must have been callusing you must have been callusing they must have been callusing

Negation

Simple form	V-ing form
I must not callus you must not callus he must not callus we must not callus you must not callus they must not callus	I must not be callusing you must not be callusing he must not be callusing we must not be callusing you must not be callusing they must not be callusing
Perfect	V-ing perfect
I must not have callused you must not have callused he must not have callused we must not have callused you must not have callused they must not have callused	I must not have been callusing you must not have been callusing he must not have been callusing we must not have been callusing you must not have been callusing they must not have been callusing

Interrogative form

Simple form	V-ing form
must I callus? must you callus? must he callus? must we callus? must you callus? must they callus?	must I be callusing? must you be callusing? must he be callusing? must we be callusing? must you be callusing? must they be callusing?
Perfect	V-ing perfect
must I have callused? must you have callused? must he have callused? must we have callused? must you have callused? must they have callused?	must I have been callusing? must you have been callusing? must he have been callusing? must we have been callusing? must you have been callusing? must they have been callusing?

Interro-negative form

Simple form	V-ing form
must I not callus? must you not callus? must he not callus? must we not callus? must you not callus? must they not callus?	must I not be callusing? must you not be callusing? must he not be callusing? must we not be callusing? must you not be callusing? must they not be callusing?
Perfect	V-ing perfect
must I not have callused? must you not have callused? must he not have callused? must we not have callused? must you not have callused? must they not have callused?	must I not have been callusing? must you not have been callusing? must he not have been callusing? must we not have been callusing? must you not have been callusing? must they not have been callusing?