could even
Regular verb: even - evened- evened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could even
you could even
he could even
we could even
you could even
they could even 	I could be evening
you could be evening
he could be evening
we could be evening
you could be evening
they could be evening	I could have evened
you could have evened
he could have evened
we could have evened
you could have evened
they could have evened	I could have been evening
you could have been evening
he could have been evening
we could have been evening
you could have been evening
they could have been evening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not even
you could not even
he could not even
we could not even
you could not even
they could not even 	I could not be evening
you could not be evening
he could not be evening
we could not be evening
you could not be evening
they could not be evening	I could not have evened
you could not have evened
he could not have evened
we could not have evened
you could not have evened
they could not have evened	I could not have been evening
you could not have been evening
he could not have been evening
we could not have been evening
you could not have been evening
they could not have been evening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I even?
could you even?
could he even?
could we even?
could you even?
could they even? 	could I be evening?
could you be evening?
could he be evening?
could we be evening?
could you be evening?
could they be evening? 	could I have evened?
could you have evened?
could he have evened?
could we have evened?
could you have evened?
could they have evened? 	could I have been evening?
could you have been evening?
could he have been evening?
could we have been evening?
could you have been evening?
could they have been evening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not even?
could you not even?
could he not even?
could we not even?
could you not even?
could they not even? 	could I not be evening?
could you not be evening?
could he not be evening?
could we not be evening?
could you not be evening?
could they not be evening? 	could I not have evened?
could you not have evened?
could he not have evened?
could we not have evened?
could you not have evened?
could they not have evened? 	could I not have been evening?
could you not have been evening?
could he not have been evening?
could we not have been evening?
could you not have been evening?
could they not have been evening?