English verb conjugation
MUST HELVE

Regular verb: helve - helved - helved

Affirmation

Simple form	V-ing form
I must helve you must helve he must helve we must helve you must helve they must helve	I must be helving you must be helving he must be helving we must be helving you must be helving they must be helving
Perfect	V-ing perfect
I must have helved you must have helved he must have helved we must have helved you must have helved they must have helved	I must have been helving you must have been helving he must have been helving we must have been helving you must have been helving they must have been helving

Negation

Simple form	V-ing form
I must not helve you must not helve he must not helve we must not helve you must not helve they must not helve	I must not be helving you must not be helving he must not be helving we must not be helving you must not be helving they must not be helving
Perfect	V-ing perfect
I must not have helved you must not have helved he must not have helved we must not have helved you must not have helved they must not have helved	I must not have been helving you must not have been helving he must not have been helving we must not have been helving you must not have been helving they must not have been helving

Interrogative form

Simple form	V-ing form
must I helve? must you helve? must he helve? must we helve? must you helve? must they helve?	must I be helving? must you be helving? must he be helving? must we be helving? must you be helving? must they be helving?
Perfect	V-ing perfect
must I have helved? must you have helved? must he have helved? must we have helved? must you have helved? must they have helved?	must I have been helving? must you have been helving? must he have been helving? must we have been helving? must you have been helving? must they have been helving?

Interro-negative form

Simple form	V-ing form
must I not helve? must you not helve? must he not helve? must we not helve? must you not helve? must they not helve?	must I not be helving? must you not be helving? must he not be helving? must we not be helving? must you not be helving? must they not be helving?
Perfect	V-ing perfect
must I not have helved? must you not have helved? must he not have helved? must we not have helved? must you not have helved? must they not have helved?	must I not have been helving? must you not have been helving? must he not have been helving? must we not have been helving? must you not have been helving? must they not have been helving?