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
she could backstop
we could backstop
you could backstop
they could backstop 	I could be backstoping
you could be backstoping
she could be backstoping
we could be backstoping
you could be backstoping
they could be backstoping	I could have backstoped
you could have backstoped
she 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
she 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 could not backstop
you could not backstop
she could not backstop
we could not backstop
you could not backstop
they could not backstop 	I could not be backstoping
you could not be backstoping
she could not be backstoping
we could not be backstoping
you could not be backstoping
they could not be backstoping	I could not have backstoped
you could not have backstoped
she could not have backstoped
we could not have backstoped
you could not have backstoped
they could not have backstoped	I could not have been backstoping
you could not have been backstoping
she could not have been backstoping
we could not have been backstoping
you could not have been backstoping
they could not have been backstoping	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I backstop?
could you backstop?
could she backstop?
could we backstop?
could you backstop?
could they backstop? 	could I be backstoping?
could you be backstoping?
could she be backstoping?
could we be backstoping?
could you be backstoping?
could they be backstoping? 	could I have backstoped?
could you have backstoped?
could she 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 she 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 	
could I not backstop?
could you not backstop?
could she not backstop?
could we not backstop?
could you not backstop?
could they not backstop? 	could I not be backstoping?
could you not be backstoping?
could she not be backstoping?
could we not be backstoping?
could you not be backstoping?
could they not be backstoping? 	could I not have backstoped?
could you not have backstoped?
could she not have backstoped?
could we not have backstoped?
could you not have backstoped?
could they not have backstoped? 	could I not have been backstoping?
could you not have been backstoping?
could she not have been backstoping?
could we not have been backstoping?
could you not have been backstoping?
could they not have been backstoping?