English verb conjugation
MUST BUTTERFLY

Regular verb: butterfly - butterflied - butterflied

Affirmation

Simple form	V-ing form
I must butterfly you must butterfly he must butterfly we must butterfly you must butterfly they must butterfly	I must be butterflying you must be butterflying he must be butterflying we must be butterflying you must be butterflying they must be butterflying
Perfect	V-ing perfect
I must have butterflied you must have butterflied he must have butterflied we must have butterflied you must have butterflied they must have butterflied	I must have been butterflying you must have been butterflying he must have been butterflying we must have been butterflying you must have been butterflying they must have been butterflying

Negation

Simple form	V-ing form
I must not butterfly you must not butterfly he must not butterfly we must not butterfly you must not butterfly they must not butterfly	I must not be butterflying you must not be butterflying he must not be butterflying we must not be butterflying you must not be butterflying they must not be butterflying
Perfect	V-ing perfect
I must not have butterflied you must not have butterflied he must not have butterflied we must not have butterflied you must not have butterflied they must not have butterflied	I must not have been butterflying you must not have been butterflying he must not have been butterflying we must not have been butterflying you must not have been butterflying they must not have been butterflying

Interrogative form

Simple form	V-ing form
must I butterfly? must you butterfly? must he butterfly? must we butterfly? must you butterfly? must they butterfly?	must I be butterflying? must you be butterflying? must he be butterflying? must we be butterflying? must you be butterflying? must they be butterflying?
Perfect	V-ing perfect
must I have butterflied? must you have butterflied? must he have butterflied? must we have butterflied? must you have butterflied? must they have butterflied?	must I have been butterflying? must you have been butterflying? must he have been butterflying? must we have been butterflying? must you have been butterflying? must they have been butterflying?

Interro-negative form

Simple form	V-ing form
must I not butterfly? must you not butterfly? must he not butterfly? must we not butterfly? must you not butterfly? must they not butterfly?	must I not be butterflying? must you not be butterflying? must he not be butterflying? must we not be butterflying? must you not be butterflying? must they not be butterflying?
Perfect	V-ing perfect
must I not have butterflied? must you not have butterflied? must he not have butterflied? must we not have butterflied? must you not have butterflied? must they not have butterflied?	must I not have been butterflying? must you not have been butterflying? must he not have been butterflying? must we not have been butterflying? must you not have been butterflying? must they not have been butterflying?