English verb conjugation
COULD REIGN

Regular verb: reign - reigned - reigned

Affirmation

Simple form	V-ing form
I could reign you could reign he could reign we could reign you could reign they could reign	I could be reigning you could be reigning he could be reigning we could be reigning you could be reigning they could be reigning
Perfect	V-ing perfect
I could have reigned you could have reigned he 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 he 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
I couldn't reign you couldn't reign he 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 he couldn't be reigning we couldn't be reigning you couldn't be reigning they couldn't be reigning
Perfect	V-ing perfect
I couldn't have reigned you couldn't have reigned he 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 he 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
could I reign? could you reign? could he reign? could we reign? could you reign? could they reign?	could I be reigning? could you be reigning? could he be reigning? could we be reigning? could you be reigning? could they be reigning?
Perfect	V-ing perfect
could I have reigned? could you have reigned? could he 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 he 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
couldn't I reign? couldn't you reign? couldn't he 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 he be reigning? couldn't we be reigning? couldn't you be reigning? couldn't they be reigning?
Perfect	V-ing perfect
couldn't I have reigned? couldn't you have reigned? couldn't he 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 he have been reigning? couldn't we have been reigning? couldn't you have been reigning? couldn't they have been reigning?