English verb conjugation
MUST IMPALE

Regular verb: impale - impaled - impaled

Affirmation

Simple form	V-ing form
I must impale you must impale he must impale we must impale you must impale they must impale	I must be impaling you must be impaling he must be impaling we must be impaling you must be impaling they must be impaling
Perfect	V-ing perfect
I must have impaled you must have impaled he must have impaled we must have impaled you must have impaled they must have impaled	I must have been impaling you must have been impaling he must have been impaling we must have been impaling you must have been impaling they must have been impaling

Negation

Simple form	V-ing form
I mustn't impale you mustn't impale he mustn't impale we mustn't impale you mustn't impale they mustn't impale	I mustn't be impaling you mustn't be impaling he mustn't be impaling we mustn't be impaling you mustn't be impaling they mustn't be impaling
Perfect	V-ing perfect
I mustn't have impaled you mustn't have impaled he mustn't have impaled we mustn't have impaled you mustn't have impaled they mustn't have impaled	I mustn't have been impaling you mustn't have been impaling he mustn't have been impaling we mustn't have been impaling you mustn't have been impaling they mustn't have been impaling

Interrogative form

Simple form	V-ing form
must I impale? must you impale? must he impale? must we impale? must you impale? must they impale?	must I be impaling? must you be impaling? must he be impaling? must we be impaling? must you be impaling? must they be impaling?
Perfect	V-ing perfect
must I have impaled? must you have impaled? must he have impaled? must we have impaled? must you have impaled? must they have impaled?	must I have been impaling? must you have been impaling? must he have been impaling? must we have been impaling? must you have been impaling? must they have been impaling?

Interro-negative form

Simple form	V-ing form
mustn't I impale? mustn't you impale? mustn't he impale? mustn't we impale? mustn't you impale? mustn't they impale?	mustn't I be impaling? mustn't you be impaling? mustn't he be impaling? mustn't we be impaling? mustn't you be impaling? mustn't they be impaling?
Perfect	V-ing perfect
mustn't I have impaled? mustn't you have impaled? mustn't he have impaled? mustn't we have impaled? mustn't you have impaled? mustn't they have impaled?	mustn't I have been impaling? mustn't you have been impaling? mustn't he have been impaling? mustn't we have been impaling? mustn't you have been impaling? mustn't they have been impaling?