must butterfly
Verbe régulier : butterfly - butterflied- butterflied

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must butterfly
you must butterfly
she must butterfly
we must butterfly
you must butterfly
they must butterfly 	I must be butterflying
you must be butterflying
she must be butterflying
we must be butterflying
you must be butterflying
they must be butterflying	I must have butterflied
you must have butterflied
she 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
she must have been butterflying
we must have been butterflying
you must have been butterflying
they must have been butterflying	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not butterfly
you must not butterfly
she 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
she must not be butterflying
we must not be butterflying
you must not be butterflying
they must not be butterflying	I must not have butterflied
you must not have butterflied
she 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
she must not have been butterflying
we must not have been butterflying
you must not have been butterflying
they must not have been butterflying	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I butterfly?
must you butterfly?
must she butterfly?
must we butterfly?
must you butterfly?
must they butterfly? 	must I be butterflying?
must you be butterflying?
must she be butterflying?
must we be butterflying?
must you be butterflying?
must they be butterflying? 	must I have butterflied?
must you have butterflied?
must she 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 she have been butterflying?
must we have been butterflying?
must you have been butterflying?
must they have been butterflying? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not butterfly?
must you not butterfly?
must she 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 she not be butterflying?
must we not be butterflying?
must you not be butterflying?
must they not be butterflying? 	must I not have butterflied?
must you not have butterflied?
must she 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 she not have been butterflying?
must we not have been butterflying?
must you not have been butterflying?
must they not have been butterflying?