could kibble
Regular verb: kibble - kibbled- kibbled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could kibble
you could kibble
she could kibble
we could kibble
you could kibble
they could kibble 	I could be kibbling
you could be kibbling
she could be kibbling
we could be kibbling
you could be kibbling
they could be kibbling	I could have kibbled
you could have kibbled
she could have kibbled
we could have kibbled
you could have kibbled
they could have kibbled	I could have been kibbling
you could have been kibbling
she could have been kibbling
we could have been kibbling
you could have been kibbling
they could have been kibbling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not kibble
you could not kibble
she could not kibble
we could not kibble
you could not kibble
they could not kibble 	I could not be kibbling
you could not be kibbling
she could not be kibbling
we could not be kibbling
you could not be kibbling
they could not be kibbling	I could not have kibbled
you could not have kibbled
she could not have kibbled
we could not have kibbled
you could not have kibbled
they could not have kibbled	I could not have been kibbling
you could not have been kibbling
she could not have been kibbling
we could not have been kibbling
you could not have been kibbling
they could not have been kibbling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I kibble?
could you kibble?
could she kibble?
could we kibble?
could you kibble?
could they kibble? 	could I be kibbling?
could you be kibbling?
could she be kibbling?
could we be kibbling?
could you be kibbling?
could they be kibbling? 	could I have kibbled?
could you have kibbled?
could she have kibbled?
could we have kibbled?
could you have kibbled?
could they have kibbled? 	could I have been kibbling?
could you have been kibbling?
could she have been kibbling?
could we have been kibbling?
could you have been kibbling?
could they have been kibbling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not kibble?
could you not kibble?
could she not kibble?
could we not kibble?
could you not kibble?
could they not kibble? 	could I not be kibbling?
could you not be kibbling?
could she not be kibbling?
could we not be kibbling?
could you not be kibbling?
could they not be kibbling? 	could I not have kibbled?
could you not have kibbled?
could she not have kibbled?
could we not have kibbled?
could you not have kibbled?
could they not have kibbled? 	could I not have been kibbling?
could you not have been kibbling?
could she not have been kibbling?
could we not have been kibbling?
could you not have been kibbling?
could they not have been kibbling?