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 could not flap
you could not flap
he could not flap
we could not flap
you could not flap
they could not flap 	I could not be flapping
you could not be flapping
he could not be flapping
we could not be flapping
you could not be flapping
they could not be flapping	I could not have flapped
you could not have flapped
he could not have flapped
we could not have flapped
you could not have flapped
they could not have flapped	I could not have been flapping
you could not have been flapping
he could not have been flapping
we could not have been flapping
you could not have been flapping
they could not 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 	
could I not flap?
could you not flap?
could he not flap?
could we not flap?
could you not flap?
could they not flap? 	could I not be flapping?
could you not be flapping?
could he not be flapping?
could we not be flapping?
could you not be flapping?
could they not be flapping? 	could I not have flapped?
could you not have flapped?
could he not have flapped?
could we not have flapped?
could you not have flapped?
could they not have flapped? 	could I not have been flapping?
could you not have been flapping?
could he not have been flapping?
could we not have been flapping?
could you not have been flapping?
could they not have been flapping?