could knoll
Verbo regular: knoll - knolled- knolled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could knoll
you could knoll
she could knoll
we could knoll
you could knoll
they could knoll 	I could be knolling
you could be knolling
she could be knolling
we could be knolling
you could be knolling
they could be knolling	I could have knolled
you could have knolled
she could have knolled
we could have knolled
you could have knolled
they could have knolled	I could have been knolling
you could have been knolling
she could have been knolling
we could have been knolling
you could have been knolling
they could have been knolling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not knoll
you could not knoll
she could not knoll
we could not knoll
you could not knoll
they could not knoll 	I could not be knolling
you could not be knolling
she could not be knolling
we could not be knolling
you could not be knolling
they could not be knolling	I could not have knolled
you could not have knolled
she could not have knolled
we could not have knolled
you could not have knolled
they could not have knolled	I could not have been knolling
you could not have been knolling
she could not have been knolling
we could not have been knolling
you could not have been knolling
they could not have been knolling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I knoll?
could you knoll?
could she knoll?
could we knoll?
could you knoll?
could they knoll? 	could I be knolling?
could you be knolling?
could she be knolling?
could we be knolling?
could you be knolling?
could they be knolling? 	could I have knolled?
could you have knolled?
could she have knolled?
could we have knolled?
could you have knolled?
could they have knolled? 	could I have been knolling?
could you have been knolling?
could she have been knolling?
could we have been knolling?
could you have been knolling?
could they have been knolling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not knoll?
could you not knoll?
could she not knoll?
could we not knoll?
could you not knoll?
could they not knoll? 	could I not be knolling?
could you not be knolling?
could she not be knolling?
could we not be knolling?
could you not be knolling?
could they not be knolling? 	could I not have knolled?
could you not have knolled?
could she not have knolled?
could we not have knolled?
could you not have knolled?
could they not have knolled? 	could I not have been knolling?
could you not have been knolling?
could she not have been knolling?
could we not have been knolling?
could you not have been knolling?
could they not have been knolling?