could backstop
Verbo regular: backstop - backstoped- backstoped

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could backstop
you could backstop
he could backstop
we could backstop
you could backstop
they could backstop 	I could be backstoping
you could be backstoping
he could be backstoping
we could be backstoping
you could be backstoping
they could be backstoping	I could have backstoped
you could have backstoped
he could have backstoped
we could have backstoped
you could have backstoped
they could have backstoped	I could have been backstoping
you could have been backstoping
he could have been backstoping
we could have been backstoping
you could have been backstoping
they could have been backstoping	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't backstop
you couldn't backstop
he couldn't backstop
we couldn't backstop
you couldn't backstop
they couldn't backstop 	I couldn't be backstoping
you couldn't be backstoping
he couldn't be backstoping
we couldn't be backstoping
you couldn't be backstoping
they couldn't be backstoping	I couldn't have backstoped
you couldn't have backstoped
he couldn't have backstoped
we couldn't have backstoped
you couldn't have backstoped
they couldn't have backstoped	I couldn't have been backstoping
you couldn't have been backstoping
he couldn't have been backstoping
we couldn't have been backstoping
you couldn't have been backstoping
they couldn't have been backstoping	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I backstop?
could you backstop?
could he backstop?
could we backstop?
could you backstop?
could they backstop? 	could I be backstoping?
could you be backstoping?
could he be backstoping?
could we be backstoping?
could you be backstoping?
could they be backstoping? 	could I have backstoped?
could you have backstoped?
could he have backstoped?
could we have backstoped?
could you have backstoped?
could they have backstoped? 	could I have been backstoping?
could you have been backstoping?
could he have been backstoping?
could we have been backstoping?
could you have been backstoping?
could they have been backstoping? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I backstop?
couldn't you backstop?
couldn't he backstop?
couldn't we backstop?
couldn't you backstop?
couldn't they backstop? 	couldn't I be backstoping?
couldn't you be backstoping?
couldn't he be backstoping?
couldn't we be backstoping?
couldn't you be backstoping?
couldn't they be backstoping? 	couldn't I have backstoped?
couldn't you have backstoped?
couldn't he have backstoped?
couldn't we have backstoped?
couldn't you have backstoped?
couldn't they have backstoped? 	couldn't I have been backstoping?
couldn't you have been backstoping?
couldn't he have been backstoping?
couldn't we have been backstoping?
couldn't you have been backstoping?
couldn't they have been backstoping?