English verb conjugation
MUST OVERSTUFF

Regular verb: overstuff - overstuffed - overstuffed

Affirmation

Simple form	V-ing form
I must overstuff you must overstuff he must overstuff we must overstuff you must overstuff they must overstuff	I must be overstuffing you must be overstuffing he must be overstuffing we must be overstuffing you must be overstuffing they must be overstuffing
Perfect	V-ing perfect
I must have overstuffed you must have overstuffed he must have overstuffed we must have overstuffed you must have overstuffed they must have overstuffed	I must have been overstuffing you must have been overstuffing he must have been overstuffing we must have been overstuffing you must have been overstuffing they must have been overstuffing

Negation

Simple form	V-ing form
I mustn't overstuff you mustn't overstuff he mustn't overstuff we mustn't overstuff you mustn't overstuff they mustn't overstuff	I mustn't be overstuffing you mustn't be overstuffing he mustn't be overstuffing we mustn't be overstuffing you mustn't be overstuffing they mustn't be overstuffing
Perfect	V-ing perfect
I mustn't have overstuffed you mustn't have overstuffed he mustn't have overstuffed we mustn't have overstuffed you mustn't have overstuffed they mustn't have overstuffed	I mustn't have been overstuffing you mustn't have been overstuffing he mustn't have been overstuffing we mustn't have been overstuffing you mustn't have been overstuffing they mustn't have been overstuffing

Interrogative form

Simple form	V-ing form
must I overstuff? must you overstuff? must he overstuff? must we overstuff? must you overstuff? must they overstuff?	must I be overstuffing? must you be overstuffing? must he be overstuffing? must we be overstuffing? must you be overstuffing? must they be overstuffing?
Perfect	V-ing perfect
must I have overstuffed? must you have overstuffed? must he have overstuffed? must we have overstuffed? must you have overstuffed? must they have overstuffed?	must I have been overstuffing? must you have been overstuffing? must he have been overstuffing? must we have been overstuffing? must you have been overstuffing? must they have been overstuffing?

Interro-negative form

Simple form	V-ing form
mustn't I overstuff? mustn't you overstuff? mustn't he overstuff? mustn't we overstuff? mustn't you overstuff? mustn't they overstuff?	mustn't I be overstuffing? mustn't you be overstuffing? mustn't he be overstuffing? mustn't we be overstuffing? mustn't you be overstuffing? mustn't they be overstuffing?
Perfect	V-ing perfect
mustn't I have overstuffed? mustn't you have overstuffed? mustn't he have overstuffed? mustn't we have overstuffed? mustn't you have overstuffed? mustn't they have overstuffed?	mustn't I have been overstuffing? mustn't you have been overstuffing? mustn't he have been overstuffing? mustn't we have been overstuffing? mustn't you have been overstuffing? mustn't they have been overstuffing?