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 couldn't even
you couldn't even
he couldn't even
we couldn't even
you couldn't even
they couldn't even 	I couldn't be evening
you couldn't be evening
he couldn't be evening
we couldn't be evening
you couldn't be evening
they couldn't be evening	I couldn't have evened
you couldn't have evened
he couldn't have evened
we couldn't have evened
you couldn't have evened
they couldn't have evened	I couldn't have been evening
you couldn't have been evening
he couldn't have been evening
we couldn't have been evening
you couldn't have been evening
they couldn't 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 	
couldn't I even?
couldn't you even?
couldn't he even?
couldn't we even?
couldn't you even?
couldn't they even? 	couldn't I be evening?
couldn't you be evening?
couldn't he be evening?
couldn't we be evening?
couldn't you be evening?
couldn't they be evening? 	couldn't I have evened?
couldn't you have evened?
couldn't he have evened?
couldn't we have evened?
couldn't you have evened?
couldn't they have evened? 	couldn't I have been evening?
couldn't you have been evening?
couldn't he have been evening?
couldn't we have been evening?
couldn't you have been evening?
couldn't they have been evening?