could negative
Verbo regular: negative - negatived- negatived

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could negative
you could negative
she could negative
we could negative
you could negative
they could negative 	I could be negativing
you could be negativing
she could be negativing
we could be negativing
you could be negativing
they could be negativing	I could have negatived
you could have negatived
she could have negatived
we could have negatived
you could have negatived
they could have negatived	I could have been negativing
you could have been negativing
she could have been negativing
we could have been negativing
you could have been negativing
they could have been negativing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not negative
you could not negative
she could not negative
we could not negative
you could not negative
they could not negative 	I could not be negativing
you could not be negativing
she could not be negativing
we could not be negativing
you could not be negativing
they could not be negativing	I could not have negatived
you could not have negatived
she could not have negatived
we could not have negatived
you could not have negatived
they could not have negatived	I could not have been negativing
you could not have been negativing
she could not have been negativing
we could not have been negativing
you could not have been negativing
they could not have been negativing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I negative?
could you negative?
could she negative?
could we negative?
could you negative?
could they negative? 	could I be negativing?
could you be negativing?
could she be negativing?
could we be negativing?
could you be negativing?
could they be negativing? 	could I have negatived?
could you have negatived?
could she have negatived?
could we have negatived?
could you have negatived?
could they have negatived? 	could I have been negativing?
could you have been negativing?
could she have been negativing?
could we have been negativing?
could you have been negativing?
could they have been negativing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not negative?
could you not negative?
could she not negative?
could we not negative?
could you not negative?
could they not negative? 	could I not be negativing?
could you not be negativing?
could she not be negativing?
could we not be negativing?
could you not be negativing?
could they not be negativing? 	could I not have negatived?
could you not have negatived?
could she not have negatived?
could we not have negatived?
could you not have negatived?
could they not have negatived? 	could I not have been negativing?
could you not have been negativing?
could she not have been negativing?
could we not have been negativing?
could you not have been negativing?
could they not have been negativing?