English verb conjugation
MUST DAMP

Regular verb: damp - damped - damped

Affirmation

Simple form	V-ing form
I must damp you must damp she must damp we must damp you must damp they must damp	I must be damping you must be damping she must be damping we must be damping you must be damping they must be damping
Perfect	V-ing perfect
I must have damped you must have damped she must have damped we must have damped you must have damped they must have damped	I must have been damping you must have been damping she must have been damping we must have been damping you must have been damping they must have been damping

Negation

Simple form	V-ing form
I must not damp you must not damp she must not damp we must not damp you must not damp they must not damp	I must not be damping you must not be damping she must not be damping we must not be damping you must not be damping they must not be damping
Perfect	V-ing perfect
I must not have damped you must not have damped she must not have damped we must not have damped you must not have damped they must not have damped	I must not have been damping you must not have been damping she must not have been damping we must not have been damping you must not have been damping they must not have been damping

Interrogative form

Simple form	V-ing form
must I damp? must you damp? must she damp? must we damp? must you damp? must they damp?	must I be damping? must you be damping? must she be damping? must we be damping? must you be damping? must they be damping?
Perfect	V-ing perfect
must I have damped? must you have damped? must she have damped? must we have damped? must you have damped? must they have damped?	must I have been damping? must you have been damping? must she have been damping? must we have been damping? must you have been damping? must they have been damping?

Interro-negative form

Simple form	V-ing form
must I not damp? must you not damp? must she not damp? must we not damp? must you not damp? must they not damp?	must I not be damping? must you not be damping? must she not be damping? must we not be damping? must you not be damping? must they not be damping?
Perfect	V-ing perfect
must I not have damped? must you not have damped? must she not have damped? must we not have damped? must you not have damped? must they not have damped?	must I not have been damping? must you not have been damping? must she not have been damping? must we not have been damping? must you not have been damping? must they not have been damping?