English verb conjugation
MUST PLUG

Regular verb: plug - plugged - plugged

Affirmation

Simple form	V-ing form
I must plug you must plug she must plug we must plug you must plug they must plug	I must be plugging you must be plugging she must be plugging we must be plugging you must be plugging they must be plugging
Perfect	V-ing perfect
I must have plugged you must have plugged she must have plugged we must have plugged you must have plugged they must have plugged	I must have been plugging you must have been plugging she must have been plugging we must have been plugging you must have been plugging they must have been plugging

Negation

Simple form	V-ing form
I must not plug you must not plug she must not plug we must not plug you must not plug they must not plug	I must not be plugging you must not be plugging she must not be plugging we must not be plugging you must not be plugging they must not be plugging
Perfect	V-ing perfect
I must not have plugged you must not have plugged she must not have plugged we must not have plugged you must not have plugged they must not have plugged	I must not have been plugging you must not have been plugging she must not have been plugging we must not have been plugging you must not have been plugging they must not have been plugging

Interrogative form

Simple form	V-ing form
must I plug? must you plug? must she plug? must we plug? must you plug? must they plug?	must I be plugging? must you be plugging? must she be plugging? must we be plugging? must you be plugging? must they be plugging?
Perfect	V-ing perfect
must I have plugged? must you have plugged? must she have plugged? must we have plugged? must you have plugged? must they have plugged?	must I have been plugging? must you have been plugging? must she have been plugging? must we have been plugging? must you have been plugging? must they have been plugging?

Interro-negative form

Simple form	V-ing form
must I not plug? must you not plug? must she not plug? must we not plug? must you not plug? must they not plug?	must I not be plugging? must you not be plugging? must she not be plugging? must we not be plugging? must you not be plugging? must they not be plugging?
Perfect	V-ing perfect
must I not have plugged? must you not have plugged? must she not have plugged? must we not have plugged? must you not have plugged? must they not have plugged?	must I not have been plugging? must you not have been plugging? must she not have been plugging? must we not have been plugging? must you not have been plugging? must they not have been plugging?