could backstroke
Verbo regular: backstroke - backstroked- backstroked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could backstroke
you could backstroke
he could backstroke
we could backstroke
you could backstroke
they could backstroke 	I could be backstroking
you could be backstroking
he could be backstroking
we could be backstroking
you could be backstroking
they could be backstroking	I could have backstroked
you could have backstroked
he could have backstroked
we could have backstroked
you could have backstroked
they could have backstroked	I could have been backstroking
you could have been backstroking
he could have been backstroking
we could have been backstroking
you could have been backstroking
they could have been backstroking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't backstroke
you couldn't backstroke
he couldn't backstroke
we couldn't backstroke
you couldn't backstroke
they couldn't backstroke 	I couldn't be backstroking
you couldn't be backstroking
he couldn't be backstroking
we couldn't be backstroking
you couldn't be backstroking
they couldn't be backstroking	I couldn't have backstroked
you couldn't have backstroked
he couldn't have backstroked
we couldn't have backstroked
you couldn't have backstroked
they couldn't have backstroked	I couldn't have been backstroking
you couldn't have been backstroking
he couldn't have been backstroking
we couldn't have been backstroking
you couldn't have been backstroking
they couldn't have been backstroking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I backstroke?
could you backstroke?
could he backstroke?
could we backstroke?
could you backstroke?
could they backstroke? 	could I be backstroking?
could you be backstroking?
could he be backstroking?
could we be backstroking?
could you be backstroking?
could they be backstroking? 	could I have backstroked?
could you have backstroked?
could he have backstroked?
could we have backstroked?
could you have backstroked?
could they have backstroked? 	could I have been backstroking?
could you have been backstroking?
could he have been backstroking?
could we have been backstroking?
could you have been backstroking?
could they have been backstroking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I backstroke?
couldn't you backstroke?
couldn't he backstroke?
couldn't we backstroke?
couldn't you backstroke?
couldn't they backstroke? 	couldn't I be backstroking?
couldn't you be backstroking?
couldn't he be backstroking?
couldn't we be backstroking?
couldn't you be backstroking?
couldn't they be backstroking? 	couldn't I have backstroked?
couldn't you have backstroked?
couldn't he have backstroked?
couldn't we have backstroked?
couldn't you have backstroked?
couldn't they have backstroked? 	couldn't I have been backstroking?
couldn't you have been backstroking?
couldn't he have been backstroking?
couldn't we have been backstroking?
couldn't you have been backstroking?
couldn't they have been backstroking?