English verb conjugation
MUST PRESS

Regular verb: press - pressed - pressed

Affirmation

Simple form	V-ing form
I must press you must press he must press we must press you must press they must press	I must be pressing you must be pressing he must be pressing we must be pressing you must be pressing they must be pressing
Perfect	V-ing perfect
I must have pressed you must have pressed he must have pressed we must have pressed you must have pressed they must have pressed	I must have been pressing you must have been pressing he must have been pressing we must have been pressing you must have been pressing they must have been pressing

Negation

Simple form	V-ing form
I mustn't press you mustn't press he mustn't press we mustn't press you mustn't press they mustn't press	I mustn't be pressing you mustn't be pressing he mustn't be pressing we mustn't be pressing you mustn't be pressing they mustn't be pressing
Perfect	V-ing perfect
I mustn't have pressed you mustn't have pressed he mustn't have pressed we mustn't have pressed you mustn't have pressed they mustn't have pressed	I mustn't have been pressing you mustn't have been pressing he mustn't have been pressing we mustn't have been pressing you mustn't have been pressing they mustn't have been pressing

Interrogative form

Simple form	V-ing form
must I press? must you press? must he press? must we press? must you press? must they press?	must I be pressing? must you be pressing? must he be pressing? must we be pressing? must you be pressing? must they be pressing?
Perfect	V-ing perfect
must I have pressed? must you have pressed? must he have pressed? must we have pressed? must you have pressed? must they have pressed?	must I have been pressing? must you have been pressing? must he have been pressing? must we have been pressing? must you have been pressing? must they have been pressing?

Interro-negative form

Simple form	V-ing form
mustn't I press? mustn't you press? mustn't he press? mustn't we press? mustn't you press? mustn't they press?	mustn't I be pressing? mustn't you be pressing? mustn't he be pressing? mustn't we be pressing? mustn't you be pressing? mustn't they be pressing?
Perfect	V-ing perfect
mustn't I have pressed? mustn't you have pressed? mustn't he have pressed? mustn't we have pressed? mustn't you have pressed? mustn't they have pressed?	mustn't I have been pressing? mustn't you have been pressing? mustn't he have been pressing? mustn't we have been pressing? mustn't you have been pressing? mustn't they have been pressing?