English verb conjugation
MUST PREFREEZE

Regular verb: prefreeze - prefreezed - prefreezed

Affirmation

Simple form	V-ing form
I must prefreeze you must prefreeze she must prefreeze we must prefreeze you must prefreeze they must prefreeze	I must be prefreezing you must be prefreezing she must be prefreezing we must be prefreezing you must be prefreezing they must be prefreezing
Perfect	V-ing perfect
I must have prefreezed you must have prefreezed she must have prefreezed we must have prefreezed you must have prefreezed they must have prefreezed	I must have been prefreezing you must have been prefreezing she must have been prefreezing we must have been prefreezing you must have been prefreezing they must have been prefreezing

Negation

Simple form	V-ing form
I must not prefreeze you must not prefreeze she must not prefreeze we must not prefreeze you must not prefreeze they must not prefreeze	I must not be prefreezing you must not be prefreezing she must not be prefreezing we must not be prefreezing you must not be prefreezing they must not be prefreezing
Perfect	V-ing perfect
I must not have prefreezed you must not have prefreezed she must not have prefreezed we must not have prefreezed you must not have prefreezed they must not have prefreezed	I must not have been prefreezing you must not have been prefreezing she must not have been prefreezing we must not have been prefreezing you must not have been prefreezing they must not have been prefreezing

Interrogative form

Simple form	V-ing form
must I prefreeze? must you prefreeze? must she prefreeze? must we prefreeze? must you prefreeze? must they prefreeze?	must I be prefreezing? must you be prefreezing? must she be prefreezing? must we be prefreezing? must you be prefreezing? must they be prefreezing?
Perfect	V-ing perfect
must I have prefreezed? must you have prefreezed? must she have prefreezed? must we have prefreezed? must you have prefreezed? must they have prefreezed?	must I have been prefreezing? must you have been prefreezing? must she have been prefreezing? must we have been prefreezing? must you have been prefreezing? must they have been prefreezing?

Interro-negative form

Simple form	V-ing form
must I not prefreeze? must you not prefreeze? must she not prefreeze? must we not prefreeze? must you not prefreeze? must they not prefreeze?	must I not be prefreezing? must you not be prefreezing? must she not be prefreezing? must we not be prefreezing? must you not be prefreezing? must they not be prefreezing?
Perfect	V-ing perfect
must I not have prefreezed? must you not have prefreezed? must she not have prefreezed? must we not have prefreezed? must you not have prefreezed? must they not have prefreezed?	must I not have been prefreezing? must you not have been prefreezing? must she not have been prefreezing? must we not have been prefreezing? must you not have been prefreezing? must they not have been prefreezing?