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 must not press you must not press he must not press we must not press you must not press they must not press	I must not be pressing you must not be pressing he must not be pressing we must not be pressing you must not be pressing they must not be pressing
Perfect	V-ing perfect
I must not have pressed you must not have pressed he must not have pressed we must not have pressed you must not have pressed they must not have pressed	I must not have been pressing you must not have been pressing he must not have been pressing we must not have been pressing you must not have been pressing they must not 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
must I not press? must you not press? must he not press? must we not press? must you not press? must they not press?	must I not be pressing? must you not be pressing? must he not be pressing? must we not be pressing? must you not be pressing? must they not be pressing?
Perfect	V-ing perfect
must I not have pressed? must you not have pressed? must he not have pressed? must we not have pressed? must you not have pressed? must they not have pressed?	must I not have been pressing? must you not have been pressing? must he not have been pressing? must we not have been pressing? must you not have been pressing? must they not have been pressing?