could twitter
Verbo regular: twitter - twittered- twittered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could twitter
you could twitter
he could twitter
we could twitter
you could twitter
they could twitter 	I could be twittering
you could be twittering
he could be twittering
we could be twittering
you could be twittering
they could be twittering	I could have twittered
you could have twittered
he could have twittered
we could have twittered
you could have twittered
they could have twittered	I could have been twittering
you could have been twittering
he could have been twittering
we could have been twittering
you could have been twittering
they could have been twittering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not twitter
you could not twitter
he could not twitter
we could not twitter
you could not twitter
they could not twitter 	I could not be twittering
you could not be twittering
he could not be twittering
we could not be twittering
you could not be twittering
they could not be twittering	I could not have twittered
you could not have twittered
he could not have twittered
we could not have twittered
you could not have twittered
they could not have twittered	I could not have been twittering
you could not have been twittering
he could not have been twittering
we could not have been twittering
you could not have been twittering
they could not have been twittering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I twitter?
could you twitter?
could he twitter?
could we twitter?
could you twitter?
could they twitter? 	could I be twittering?
could you be twittering?
could he be twittering?
could we be twittering?
could you be twittering?
could they be twittering? 	could I have twittered?
could you have twittered?
could he have twittered?
could we have twittered?
could you have twittered?
could they have twittered? 	could I have been twittering?
could you have been twittering?
could he have been twittering?
could we have been twittering?
could you have been twittering?
could they have been twittering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not twitter?
could you not twitter?
could he not twitter?
could we not twitter?
could you not twitter?
could they not twitter? 	could I not be twittering?
could you not be twittering?
could he not be twittering?
could we not be twittering?
could you not be twittering?
could they not be twittering? 	could I not have twittered?
could you not have twittered?
could he not have twittered?
could we not have twittered?
could you not have twittered?
could they not have twittered? 	could I not have been twittering?
could you not have been twittering?
could he not have been twittering?
could we not have been twittering?
could you not have been twittering?
could they not have been twittering?