could floss
Verbo regular: floss - flossed- flossed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could floss
you could floss
he could floss
we could floss
you could floss
they could floss 	I could be flossing
you could be flossing
he could be flossing
we could be flossing
you could be flossing
they could be flossing	I could have flossed
you could have flossed
he could have flossed
we could have flossed
you could have flossed
they could have flossed	I could have been flossing
you could have been flossing
he could have been flossing
we could have been flossing
you could have been flossing
they could have been flossing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not floss
you could not floss
he could not floss
we could not floss
you could not floss
they could not floss 	I could not be flossing
you could not be flossing
he could not be flossing
we could not be flossing
you could not be flossing
they could not be flossing	I could not have flossed
you could not have flossed
he could not have flossed
we could not have flossed
you could not have flossed
they could not have flossed	I could not have been flossing
you could not have been flossing
he could not have been flossing
we could not have been flossing
you could not have been flossing
they could not have been flossing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I floss?
could you floss?
could he floss?
could we floss?
could you floss?
could they floss? 	could I be flossing?
could you be flossing?
could he be flossing?
could we be flossing?
could you be flossing?
could they be flossing? 	could I have flossed?
could you have flossed?
could he have flossed?
could we have flossed?
could you have flossed?
could they have flossed? 	could I have been flossing?
could you have been flossing?
could he have been flossing?
could we have been flossing?
could you have been flossing?
could they have been flossing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not floss?
could you not floss?
could he not floss?
could we not floss?
could you not floss?
could they not floss? 	could I not be flossing?
could you not be flossing?
could he not be flossing?
could we not be flossing?
could you not be flossing?
could they not be flossing? 	could I not have flossed?
could you not have flossed?
could he not have flossed?
could we not have flossed?
could you not have flossed?
could they not have flossed? 	could I not have been flossing?
could you not have been flossing?
could he not have been flossing?
could we not have been flossing?
could you not have been flossing?
could they not have been flossing?