could shadow
Verbo regular: shadow - shadowed- shadowed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could shadow
you could shadow
he could shadow
we could shadow
you could shadow
they could shadow 	I could be shadowing
you could be shadowing
he could be shadowing
we could be shadowing
you could be shadowing
they could be shadowing	I could have shadowed
you could have shadowed
he could have shadowed
we could have shadowed
you could have shadowed
they could have shadowed	I could have been shadowing
you could have been shadowing
he could have been shadowing
we could have been shadowing
you could have been shadowing
they could have been shadowing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't shadow
you couldn't shadow
he couldn't shadow
we couldn't shadow
you couldn't shadow
they couldn't shadow 	I couldn't be shadowing
you couldn't be shadowing
he couldn't be shadowing
we couldn't be shadowing
you couldn't be shadowing
they couldn't be shadowing	I couldn't have shadowed
you couldn't have shadowed
he couldn't have shadowed
we couldn't have shadowed
you couldn't have shadowed
they couldn't have shadowed	I couldn't have been shadowing
you couldn't have been shadowing
he couldn't have been shadowing
we couldn't have been shadowing
you couldn't have been shadowing
they couldn't have been shadowing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I shadow?
could you shadow?
could he shadow?
could we shadow?
could you shadow?
could they shadow? 	could I be shadowing?
could you be shadowing?
could he be shadowing?
could we be shadowing?
could you be shadowing?
could they be shadowing? 	could I have shadowed?
could you have shadowed?
could he have shadowed?
could we have shadowed?
could you have shadowed?
could they have shadowed? 	could I have been shadowing?
could you have been shadowing?
could he have been shadowing?
could we have been shadowing?
could you have been shadowing?
could they have been shadowing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I shadow?
couldn't you shadow?
couldn't he shadow?
couldn't we shadow?
couldn't you shadow?
couldn't they shadow? 	couldn't I be shadowing?
couldn't you be shadowing?
couldn't he be shadowing?
couldn't we be shadowing?
couldn't you be shadowing?
couldn't they be shadowing? 	couldn't I have shadowed?
couldn't you have shadowed?
couldn't he have shadowed?
couldn't we have shadowed?
couldn't you have shadowed?
couldn't they have shadowed? 	couldn't I have been shadowing?
couldn't you have been shadowing?
couldn't he have been shadowing?
couldn't we have been shadowing?
couldn't you have been shadowing?
couldn't they have been shadowing?