could reign
Regular verb: reign - reigned- reigned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could reign
you could reign
she could reign
we could reign
you could reign
they could reign 	I could be reigning
you could be reigning
she could be reigning
we could be reigning
you could be reigning
they could be reigning	I could have reigned
you could have reigned
she could have reigned
we could have reigned
you could have reigned
they could have reigned	I could have been reigning
you could have been reigning
she could have been reigning
we could have been reigning
you could have been reigning
they could have been reigning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not reign
you could not reign
she could not reign
we could not reign
you could not reign
they could not reign 	I could not be reigning
you could not be reigning
she could not be reigning
we could not be reigning
you could not be reigning
they could not be reigning	I could not have reigned
you could not have reigned
she could not have reigned
we could not have reigned
you could not have reigned
they could not have reigned	I could not have been reigning
you could not have been reigning
she could not have been reigning
we could not have been reigning
you could not have been reigning
they could not have been reigning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I reign?
could you reign?
could she reign?
could we reign?
could you reign?
could they reign? 	could I be reigning?
could you be reigning?
could she be reigning?
could we be reigning?
could you be reigning?
could they be reigning? 	could I have reigned?
could you have reigned?
could she have reigned?
could we have reigned?
could you have reigned?
could they have reigned? 	could I have been reigning?
could you have been reigning?
could she have been reigning?
could we have been reigning?
could you have been reigning?
could they have been reigning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not reign?
could you not reign?
could she not reign?
could we not reign?
could you not reign?
could they not reign? 	could I not be reigning?
could you not be reigning?
could she not be reigning?
could we not be reigning?
could you not be reigning?
could they not be reigning? 	could I not have reigned?
could you not have reigned?
could she not have reigned?
could we not have reigned?
could you not have reigned?
could they not have reigned? 	could I not have been reigning?
could you not have been reigning?
could she not have been reigning?
could we not have been reigning?
could you not have been reigning?
could they not have been reigning?