could flail
Verbo regular: flail - flailed- flailed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could flail
you could flail
she could flail
we could flail
you could flail
they could flail 	I could be flailing
you could be flailing
she could be flailing
we could be flailing
you could be flailing
they could be flailing	I could have flailed
you could have flailed
she could have flailed
we could have flailed
you could have flailed
they could have flailed	I could have been flailing
you could have been flailing
she could have been flailing
we could have been flailing
you could have been flailing
they could have been flailing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not flail
you could not flail
she could not flail
we could not flail
you could not flail
they could not flail 	I could not be flailing
you could not be flailing
she could not be flailing
we could not be flailing
you could not be flailing
they could not be flailing	I could not have flailed
you could not have flailed
she could not have flailed
we could not have flailed
you could not have flailed
they could not have flailed	I could not have been flailing
you could not have been flailing
she could not have been flailing
we could not have been flailing
you could not have been flailing
they could not have been flailing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I flail?
could you flail?
could she flail?
could we flail?
could you flail?
could they flail? 	could I be flailing?
could you be flailing?
could she be flailing?
could we be flailing?
could you be flailing?
could they be flailing? 	could I have flailed?
could you have flailed?
could she have flailed?
could we have flailed?
could you have flailed?
could they have flailed? 	could I have been flailing?
could you have been flailing?
could she have been flailing?
could we have been flailing?
could you have been flailing?
could they have been flailing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not flail?
could you not flail?
could she not flail?
could we not flail?
could you not flail?
could they not flail? 	could I not be flailing?
could you not be flailing?
could she not be flailing?
could we not be flailing?
could you not be flailing?
could they not be flailing? 	could I not have flailed?
could you not have flailed?
could she not have flailed?
could we not have flailed?
could you not have flailed?
could they not have flailed? 	could I not have been flailing?
could you not have been flailing?
could she not have been flailing?
could we not have been flailing?
could you not have been flailing?
could they not have been flailing?