could invalid invalid invalid invalid invalid invalid invalid invalid
Regular verb: invalid invalid invalid invalid invalid invalid invalid invalid - invalid invalid invalid invalid invalid invalid invalid invalided- invalid invalid invalid invalid invalid invalid invalid invalided

, this verb may not exist. Conjugation is given as example.

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could invalid invalid invalid invalid invalid invalid invalid invalid
you could invalid invalid invalid invalid invalid invalid invalid invalid
he could invalid invalid invalid invalid invalid invalid invalid invalid
we could invalid invalid invalid invalid invalid invalid invalid invalid
you could invalid invalid invalid invalid invalid invalid invalid invalid
they could invalid invalid invalid invalid invalid invalid invalid invalid 	I could be invalid invalid invalid invalid invalid invalid invalid invaliding
you could be invalid invalid invalid invalid invalid invalid invalid invaliding
he could be invalid invalid invalid invalid invalid invalid invalid invaliding
we could be invalid invalid invalid invalid invalid invalid invalid invaliding
you could be invalid invalid invalid invalid invalid invalid invalid invaliding
they could be invalid invalid invalid invalid invalid invalid invalid invaliding	I could have invalid invalid invalid invalid invalid invalid invalid invalided
you could have invalid invalid invalid invalid invalid invalid invalid invalided
he could have invalid invalid invalid invalid invalid invalid invalid invalided
we could have invalid invalid invalid invalid invalid invalid invalid invalided
you could have invalid invalid invalid invalid invalid invalid invalid invalided
they could have invalid invalid invalid invalid invalid invalid invalid invalided	I could have been invalid invalid invalid invalid invalid invalid invalid invaliding
you could have been invalid invalid invalid invalid invalid invalid invalid invaliding
he could have been invalid invalid invalid invalid invalid invalid invalid invaliding
we could have been invalid invalid invalid invalid invalid invalid invalid invaliding
you could have been invalid invalid invalid invalid invalid invalid invalid invaliding
they could have been invalid invalid invalid invalid invalid invalid invalid invaliding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not invalid invalid invalid invalid invalid invalid invalid invalid
you could not invalid invalid invalid invalid invalid invalid invalid invalid
he could not invalid invalid invalid invalid invalid invalid invalid invalid
we could not invalid invalid invalid invalid invalid invalid invalid invalid
you could not invalid invalid invalid invalid invalid invalid invalid invalid
they could not invalid invalid invalid invalid invalid invalid invalid invalid 	I could not be invalid invalid invalid invalid invalid invalid invalid invaliding
you could not be invalid invalid invalid invalid invalid invalid invalid invaliding
he could not be invalid invalid invalid invalid invalid invalid invalid invaliding
we could not be invalid invalid invalid invalid invalid invalid invalid invaliding
you could not be invalid invalid invalid invalid invalid invalid invalid invaliding
they could not be invalid invalid invalid invalid invalid invalid invalid invaliding	I could not have invalid invalid invalid invalid invalid invalid invalid invalided
you could not have invalid invalid invalid invalid invalid invalid invalid invalided
he could not have invalid invalid invalid invalid invalid invalid invalid invalided
we could not have invalid invalid invalid invalid invalid invalid invalid invalided
you could not have invalid invalid invalid invalid invalid invalid invalid invalided
they could not have invalid invalid invalid invalid invalid invalid invalid invalided	I could not have been invalid invalid invalid invalid invalid invalid invalid invaliding
you could not have been invalid invalid invalid invalid invalid invalid invalid invaliding
he could not have been invalid invalid invalid invalid invalid invalid invalid invaliding
we could not have been invalid invalid invalid invalid invalid invalid invalid invaliding
you could not have been invalid invalid invalid invalid invalid invalid invalid invaliding
they could not have been invalid invalid invalid invalid invalid invalid invalid invaliding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I invalid invalid invalid invalid invalid invalid invalid invalid?
could you invalid invalid invalid invalid invalid invalid invalid invalid?
could he invalid invalid invalid invalid invalid invalid invalid invalid?
could we invalid invalid invalid invalid invalid invalid invalid invalid?
could you invalid invalid invalid invalid invalid invalid invalid invalid?
could they invalid invalid invalid invalid invalid invalid invalid invalid? 	could I be invalid invalid invalid invalid invalid invalid invalid invaliding?
could you be invalid invalid invalid invalid invalid invalid invalid invaliding?
could he be invalid invalid invalid invalid invalid invalid invalid invaliding?
could we be invalid invalid invalid invalid invalid invalid invalid invaliding?
could you be invalid invalid invalid invalid invalid invalid invalid invaliding?
could they be invalid invalid invalid invalid invalid invalid invalid invaliding? 	could I have invalid invalid invalid invalid invalid invalid invalid invalided?
could you have invalid invalid invalid invalid invalid invalid invalid invalided?
could he have invalid invalid invalid invalid invalid invalid invalid invalided?
could we have invalid invalid invalid invalid invalid invalid invalid invalided?
could you have invalid invalid invalid invalid invalid invalid invalid invalided?
could they have invalid invalid invalid invalid invalid invalid invalid invalided? 	could I have been invalid invalid invalid invalid invalid invalid invalid invaliding?
could you have been invalid invalid invalid invalid invalid invalid invalid invaliding?
could he have been invalid invalid invalid invalid invalid invalid invalid invaliding?
could we have been invalid invalid invalid invalid invalid invalid invalid invaliding?
could you have been invalid invalid invalid invalid invalid invalid invalid invaliding?
could they have been invalid invalid invalid invalid invalid invalid invalid invaliding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not invalid invalid invalid invalid invalid invalid invalid invalid?
could you not invalid invalid invalid invalid invalid invalid invalid invalid?
could he not invalid invalid invalid invalid invalid invalid invalid invalid?
could we not invalid invalid invalid invalid invalid invalid invalid invalid?
could you not invalid invalid invalid invalid invalid invalid invalid invalid?
could they not invalid invalid invalid invalid invalid invalid invalid invalid? 	could I not be invalid invalid invalid invalid invalid invalid invalid invaliding?
could you not be invalid invalid invalid invalid invalid invalid invalid invaliding?
could he not be invalid invalid invalid invalid invalid invalid invalid invaliding?
could we not be invalid invalid invalid invalid invalid invalid invalid invaliding?
could you not be invalid invalid invalid invalid invalid invalid invalid invaliding?
could they not be invalid invalid invalid invalid invalid invalid invalid invaliding? 	could I not have invalid invalid invalid invalid invalid invalid invalid invalided?
could you not have invalid invalid invalid invalid invalid invalid invalid invalided?
could he not have invalid invalid invalid invalid invalid invalid invalid invalided?
could we not have invalid invalid invalid invalid invalid invalid invalid invalided?
could you not have invalid invalid invalid invalid invalid invalid invalid invalided?
could they not have invalid invalid invalid invalid invalid invalid invalid invalided? 	could I not have been invalid invalid invalid invalid invalid invalid invalid invaliding?
could you not have been invalid invalid invalid invalid invalid invalid invalid invaliding?
could he not have been invalid invalid invalid invalid invalid invalid invalid invaliding?
could we not have been invalid invalid invalid invalid invalid invalid invalid invaliding?
could you not have been invalid invalid invalid invalid invalid invalid invalid invaliding?
could they not have been invalid invalid invalid invalid invalid invalid invalid invaliding?