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 mustn't butterfly you mustn't butterfly he mustn't butterfly we mustn't butterfly you mustn't butterfly they mustn't butterfly	I mustn't be butterflying you mustn't be butterflying he mustn't be butterflying we mustn't be butterflying you mustn't be butterflying they mustn't be butterflying
Perfect	V-ing perfect
I mustn't have butterflied you mustn't have butterflied he mustn't have butterflied we mustn't have butterflied you mustn't have butterflied they mustn't have butterflied	I mustn't have been butterflying you mustn't have been butterflying he mustn't have been butterflying we mustn't have been butterflying you mustn't have been butterflying they mustn't 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
mustn't I butterfly? mustn't you butterfly? mustn't he butterfly? mustn't we butterfly? mustn't you butterfly? mustn't they butterfly?	mustn't I be butterflying? mustn't you be butterflying? mustn't he be butterflying? mustn't we be butterflying? mustn't you be butterflying? mustn't they be butterflying?
Perfect	V-ing perfect
mustn't I have butterflied? mustn't you have butterflied? mustn't he have butterflied? mustn't we have butterflied? mustn't you have butterflied? mustn't they have butterflied?	mustn't I have been butterflying? mustn't you have been butterflying? mustn't he have been butterflying? mustn't we have been butterflying? mustn't you have been butterflying? mustn't they have been butterflying?