can butterfly
Regular verb: butterfly - butterflied- butterflied

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

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

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

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