English verb conjugation
MUST FOUNDER

Regular verb: founder - foundered - foundered

Affirmation

Simple form	V-ing form
I must founder you must founder she must founder we must founder you must founder they must founder	I must be foundering you must be foundering she must be foundering we must be foundering you must be foundering they must be foundering
Perfect	V-ing perfect
I must have foundered you must have foundered she must have foundered we must have foundered you must have foundered they must have foundered	I must have been foundering you must have been foundering she must have been foundering we must have been foundering you must have been foundering they must have been foundering

Negation

Simple form	V-ing form
I must not founder you must not founder she must not founder we must not founder you must not founder they must not founder	I must not be foundering you must not be foundering she must not be foundering we must not be foundering you must not be foundering they must not be foundering
Perfect	V-ing perfect
I must not have foundered you must not have foundered she must not have foundered we must not have foundered you must not have foundered they must not have foundered	I must not have been foundering you must not have been foundering she must not have been foundering we must not have been foundering you must not have been foundering they must not have been foundering

Interrogative form

Simple form	V-ing form
must I founder? must you founder? must she founder? must we founder? must you founder? must they founder?	must I be foundering? must you be foundering? must she be foundering? must we be foundering? must you be foundering? must they be foundering?
Perfect	V-ing perfect
must I have foundered? must you have foundered? must she have foundered? must we have foundered? must you have foundered? must they have foundered?	must I have been foundering? must you have been foundering? must she have been foundering? must we have been foundering? must you have been foundering? must they have been foundering?

Interro-negative form

Simple form	V-ing form
must I not founder? must you not founder? must she not founder? must we not founder? must you not founder? must they not founder?	must I not be foundering? must you not be foundering? must she not be foundering? must we not be foundering? must you not be foundering? must they not be foundering?
Perfect	V-ing perfect
must I not have foundered? must you not have foundered? must she not have foundered? must we not have foundered? must you not have foundered? must they not have foundered?	must I not have been foundering? must you not have been foundering? must she not have been foundering? must we not have been foundering? must you not have been foundering? must they not have been foundering?