English verb conjugation
MUST SUBSERVE

Regular verb: subserve - subserved - subserved

Affirmation

Simple form	V-ing form
I must subserve you must subserve she must subserve we must subserve you must subserve they must subserve	I must be subserving you must be subserving she 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 she 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 she 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 must not subserve you must not subserve she must not subserve we must not subserve you must not subserve they must not subserve	I must not be subserving you must not be subserving she must not be subserving we must not be subserving you must not be subserving they must not be subserving
Perfect	V-ing perfect
I must not have subserved you must not have subserved she must not have subserved we must not have subserved you must not have subserved they must not have subserved	I must not have been subserving you must not have been subserving she must not have been subserving we must not have been subserving you must not have been subserving they must not have been subserving

Interrogative form

Simple form	V-ing form
must I subserve? must you subserve? must she subserve? must we subserve? must you subserve? must they subserve?	must I be subserving? must you be subserving? must she 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 she 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 she 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
must I not subserve? must you not subserve? must she not subserve? must we not subserve? must you not subserve? must they not subserve?	must I not be subserving? must you not be subserving? must she not be subserving? must we not be subserving? must you not be subserving? must they not be subserving?
Perfect	V-ing perfect
must I not have subserved? must you not have subserved? must she not have subserved? must we not have subserved? must you not have subserved? must they not have subserved?	must I not have been subserving? must you not have been subserving? must she not have been subserving? must we not have been subserving? must you not have been subserving? must they not have been subserving?