could knout
Regular verb: knout - knouted- knouted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could knout
you could knout
he could knout
we could knout
you could knout
they could knout 	I could be knouting
you could be knouting
he could be knouting
we could be knouting
you could be knouting
they could be knouting	I could have knouted
you could have knouted
he could have knouted
we could have knouted
you could have knouted
they could have knouted	I could have been knouting
you could have been knouting
he could have been knouting
we could have been knouting
you could have been knouting
they could have been knouting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not knout
you could not knout
he could not knout
we could not knout
you could not knout
they could not knout 	I could not be knouting
you could not be knouting
he could not be knouting
we could not be knouting
you could not be knouting
they could not be knouting	I could not have knouted
you could not have knouted
he could not have knouted
we could not have knouted
you could not have knouted
they could not have knouted	I could not have been knouting
you could not have been knouting
he could not have been knouting
we could not have been knouting
you could not have been knouting
they could not have been knouting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I knout?
could you knout?
could he knout?
could we knout?
could you knout?
could they knout? 	could I be knouting?
could you be knouting?
could he be knouting?
could we be knouting?
could you be knouting?
could they be knouting? 	could I have knouted?
could you have knouted?
could he have knouted?
could we have knouted?
could you have knouted?
could they have knouted? 	could I have been knouting?
could you have been knouting?
could he have been knouting?
could we have been knouting?
could you have been knouting?
could they have been knouting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not knout?
could you not knout?
could he not knout?
could we not knout?
could you not knout?
could they not knout? 	could I not be knouting?
could you not be knouting?
could he not be knouting?
could we not be knouting?
could you not be knouting?
could they not be knouting? 	could I not have knouted?
could you not have knouted?
could he not have knouted?
could we not have knouted?
could you not have knouted?
could they not have knouted? 	could I not have been knouting?
could you not have been knouting?
could he not have been knouting?
could we not have been knouting?
could you not have been knouting?
could they not have been knouting?