could flap
Verbo regular: flap - flapped- flapped

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could flap
you could flap
he could flap
we could flap
you could flap
they could flap 	I could be flapping
you could be flapping
he could be flapping
we could be flapping
you could be flapping
they could be flapping	I could have flapped
you could have flapped
he could have flapped
we could have flapped
you could have flapped
they could have flapped	I could have been flapping
you could have been flapping
he could have been flapping
we could have been flapping
you could have been flapping
they could have been flapping	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't flap
you couldn't flap
he couldn't flap
we couldn't flap
you couldn't flap
they couldn't flap 	I couldn't be flapping
you couldn't be flapping
he couldn't be flapping
we couldn't be flapping
you couldn't be flapping
they couldn't be flapping	I couldn't have flapped
you couldn't have flapped
he couldn't have flapped
we couldn't have flapped
you couldn't have flapped
they couldn't have flapped	I couldn't have been flapping
you couldn't have been flapping
he couldn't have been flapping
we couldn't have been flapping
you couldn't have been flapping
they couldn't have been flapping	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I flap?
could you flap?
could he flap?
could we flap?
could you flap?
could they flap? 	could I be flapping?
could you be flapping?
could he be flapping?
could we be flapping?
could you be flapping?
could they be flapping? 	could I have flapped?
could you have flapped?
could he have flapped?
could we have flapped?
could you have flapped?
could they have flapped? 	could I have been flapping?
could you have been flapping?
could he have been flapping?
could we have been flapping?
could you have been flapping?
could they have been flapping? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I flap?
couldn't you flap?
couldn't he flap?
couldn't we flap?
couldn't you flap?
couldn't they flap? 	couldn't I be flapping?
couldn't you be flapping?
couldn't he be flapping?
couldn't we be flapping?
couldn't you be flapping?
couldn't they be flapping? 	couldn't I have flapped?
couldn't you have flapped?
couldn't he have flapped?
couldn't we have flapped?
couldn't you have flapped?
couldn't they have flapped? 	couldn't I have been flapping?
couldn't you have been flapping?
couldn't he have been flapping?
couldn't we have been flapping?
couldn't you have been flapping?
couldn't they have been flapping?