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 couldn't reign
you couldn't reign
she couldn't reign
we couldn't reign
you couldn't reign
they couldn't reign 	I couldn't be reigning
you couldn't be reigning
she couldn't be reigning
we couldn't be reigning
you couldn't be reigning
they couldn't be reigning	I couldn't have reigned
you couldn't have reigned
she couldn't have reigned
we couldn't have reigned
you couldn't have reigned
they couldn't have reigned	I couldn't have been reigning
you couldn't have been reigning
she couldn't have been reigning
we couldn't have been reigning
you couldn't have been reigning
they couldn't 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 	
couldn't I reign?
couldn't you reign?
couldn't she reign?
couldn't we reign?
couldn't you reign?
couldn't they reign? 	couldn't I be reigning?
couldn't you be reigning?
couldn't she be reigning?
couldn't we be reigning?
couldn't you be reigning?
couldn't they be reigning? 	couldn't I have reigned?
couldn't you have reigned?
couldn't she have reigned?
couldn't we have reigned?
couldn't you have reigned?
couldn't they have reigned? 	couldn't I have been reigning?
couldn't you have been reigning?
couldn't she have been reigning?
couldn't we have been reigning?
couldn't you have been reigning?
couldn't they have been reigning?