could polka
Verbo regular: polka - polkaed- polkaed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could polka
you could polka
she could polka
we could polka
you could polka
they could polka 	I could be polkaing
you could be polkaing
she could be polkaing
we could be polkaing
you could be polkaing
they could be polkaing	I could have polkaed
you could have polkaed
she could have polkaed
we could have polkaed
you could have polkaed
they could have polkaed	I could have been polkaing
you could have been polkaing
she could have been polkaing
we could have been polkaing
you could have been polkaing
they could have been polkaing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not polka
you could not polka
she could not polka
we could not polka
you could not polka
they could not polka 	I could not be polkaing
you could not be polkaing
she could not be polkaing
we could not be polkaing
you could not be polkaing
they could not be polkaing	I could not have polkaed
you could not have polkaed
she could not have polkaed
we could not have polkaed
you could not have polkaed
they could not have polkaed	I could not have been polkaing
you could not have been polkaing
she could not have been polkaing
we could not have been polkaing
you could not have been polkaing
they could not have been polkaing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I polka?
could you polka?
could she polka?
could we polka?
could you polka?
could they polka? 	could I be polkaing?
could you be polkaing?
could she be polkaing?
could we be polkaing?
could you be polkaing?
could they be polkaing? 	could I have polkaed?
could you have polkaed?
could she have polkaed?
could we have polkaed?
could you have polkaed?
could they have polkaed? 	could I have been polkaing?
could you have been polkaing?
could she have been polkaing?
could we have been polkaing?
could you have been polkaing?
could they have been polkaing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not polka?
could you not polka?
could she not polka?
could we not polka?
could you not polka?
could they not polka? 	could I not be polkaing?
could you not be polkaing?
could she not be polkaing?
could we not be polkaing?
could you not be polkaing?
could they not be polkaing? 	could I not have polkaed?
could you not have polkaed?
could she not have polkaed?
could we not have polkaed?
could you not have polkaed?
could they not have polkaed? 	could I not have been polkaing?
could you not have been polkaing?
could she not have been polkaing?
could we not have been polkaing?
could you not have been polkaing?
could they not have been polkaing?