could stalk
Verbo regular: stalk - stalked- stalked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could stalk
you could stalk
she could stalk
we could stalk
you could stalk
they could stalk 	I could be stalking
you could be stalking
she could be stalking
we could be stalking
you could be stalking
they could be stalking	I could have stalked
you could have stalked
she could have stalked
we could have stalked
you could have stalked
they could have stalked	I could have been stalking
you could have been stalking
she could have been stalking
we could have been stalking
you could have been stalking
they could have been stalking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not stalk
you could not stalk
she could not stalk
we could not stalk
you could not stalk
they could not stalk 	I could not be stalking
you could not be stalking
she could not be stalking
we could not be stalking
you could not be stalking
they could not be stalking	I could not have stalked
you could not have stalked
she could not have stalked
we could not have stalked
you could not have stalked
they could not have stalked	I could not have been stalking
you could not have been stalking
she could not have been stalking
we could not have been stalking
you could not have been stalking
they could not have been stalking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I stalk?
could you stalk?
could she stalk?
could we stalk?
could you stalk?
could they stalk? 	could I be stalking?
could you be stalking?
could she be stalking?
could we be stalking?
could you be stalking?
could they be stalking? 	could I have stalked?
could you have stalked?
could she have stalked?
could we have stalked?
could you have stalked?
could they have stalked? 	could I have been stalking?
could you have been stalking?
could she have been stalking?
could we have been stalking?
could you have been stalking?
could they have been stalking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not stalk?
could you not stalk?
could she not stalk?
could we not stalk?
could you not stalk?
could they not stalk? 	could I not be stalking?
could you not be stalking?
could she not be stalking?
could we not be stalking?
could you not be stalking?
could they not be stalking? 	could I not have stalked?
could you not have stalked?
could she not have stalked?
could we not have stalked?
could you not have stalked?
could they not have stalked? 	could I not have been stalking?
could you not have been stalking?
could she not have been stalking?
could we not have been stalking?
could you not have been stalking?
could they not have been stalking?