can flutter
Regular verb: flutter - fluttered- fluttered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can flutter
you can flutter
he can flutter
we can flutter
you can flutter
they can flutter 	I can be fluttering
you can be fluttering
he can be fluttering
we can be fluttering
you can be fluttering
they can be fluttering	I can have fluttered
you can have fluttered
he can have fluttered
we can have fluttered
you can have fluttered
they can have fluttered	I can have been fluttering
you can have been fluttering
he can have been fluttering
we can have been fluttering
you can have been fluttering
they can have been fluttering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't flutter
you can't flutter
he can't flutter
we can't flutter
you can't flutter
they can't flutter 	I can't be fluttering
you can't be fluttering
he can't be fluttering
we can't be fluttering
you can't be fluttering
they can't be fluttering	I can't have fluttered
you can't have fluttered
he can't have fluttered
we can't have fluttered
you can't have fluttered
they can't have fluttered	I can't have been fluttering
you can't have been fluttering
he can't have been fluttering
we can't have been fluttering
you can't have been fluttering
they can't have been fluttering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I flutter?
can you flutter?
can he flutter?
can we flutter?
can you flutter?
can they flutter? 	can I be fluttering?
can you be fluttering?
can he be fluttering?
can we be fluttering?
can you be fluttering?
can they be fluttering? 	can I have fluttered?
can you have fluttered?
can he have fluttered?
can we have fluttered?
can you have fluttered?
can they have fluttered? 	can I have been fluttering?
can you have been fluttering?
can he have been fluttering?
can we have been fluttering?
can you have been fluttering?
can they have been fluttering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I flutter?
can't you flutter?
can't he flutter?
can't we flutter?
can't you flutter?
can't they flutter? 	can't I be fluttering?
can't you be fluttering?
can't he be fluttering?
can't we be fluttering?
can't you be fluttering?
can't they be fluttering? 	can't I have fluttered?
can't you have fluttered?
can't he have fluttered?
can't we have fluttered?
can't you have fluttered?
can't they have fluttered? 	can't I have been fluttering?
can't you have been fluttering?
can't he have been fluttering?
can't we have been fluttering?
can't you have been fluttering?
can't they have been fluttering?