English verb conjugation
MUST SUBSERVE

Regular verb: subserve - subserved - subserved

Affirmation

Simple form	V-ing form
I must subserve you must subserve he must subserve we must subserve you must subserve they must subserve	I must be subserving you must be subserving he must be subserving we must be subserving you must be subserving they must be subserving
Perfect	V-ing perfect
I must have subserved you must have subserved he must have subserved we must have subserved you must have subserved they must have subserved	I must have been subserving you must have been subserving he must have been subserving we must have been subserving you must have been subserving they must have been subserving

Negation

Simple form	V-ing form
I mustn't subserve you mustn't subserve he mustn't subserve we mustn't subserve you mustn't subserve they mustn't subserve	I mustn't be subserving you mustn't be subserving he mustn't be subserving we mustn't be subserving you mustn't be subserving they mustn't be subserving
Perfect	V-ing perfect
I mustn't have subserved you mustn't have subserved he mustn't have subserved we mustn't have subserved you mustn't have subserved they mustn't have subserved	I mustn't have been subserving you mustn't have been subserving he mustn't have been subserving we mustn't have been subserving you mustn't have been subserving they mustn't have been subserving

Interrogative form

Simple form	V-ing form
must I subserve? must you subserve? must he subserve? must we subserve? must you subserve? must they subserve?	must I be subserving? must you be subserving? must he be subserving? must we be subserving? must you be subserving? must they be subserving?
Perfect	V-ing perfect
must I have subserved? must you have subserved? must he have subserved? must we have subserved? must you have subserved? must they have subserved?	must I have been subserving? must you have been subserving? must he have been subserving? must we have been subserving? must you have been subserving? must they have been subserving?

Interro-negative form

Simple form	V-ing form
mustn't I subserve? mustn't you subserve? mustn't he subserve? mustn't we subserve? mustn't you subserve? mustn't they subserve?	mustn't I be subserving? mustn't you be subserving? mustn't he be subserving? mustn't we be subserving? mustn't you be subserving? mustn't they be subserving?
Perfect	V-ing perfect
mustn't I have subserved? mustn't you have subserved? mustn't he have subserved? mustn't we have subserved? mustn't you have subserved? mustn't they have subserved?	mustn't I have been subserving? mustn't you have been subserving? mustn't he have been subserving? mustn't we have been subserving? mustn't you have been subserving? mustn't they have been subserving?