could annul
Regular verb: annul - annulled- annulled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could annul
you could annul
she could annul
we could annul
you could annul
they could annul 	I could be annulling
you could be annulling
she could be annulling
we could be annulling
you could be annulling
they could be annulling	I could have annulled
you could have annulled
she could have annulled
we could have annulled
you could have annulled
they could have annulled	I could have been annulling
you could have been annulling
she could have been annulling
we could have been annulling
you could have been annulling
they could have been annulling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't annul
you couldn't annul
she couldn't annul
we couldn't annul
you couldn't annul
they couldn't annul 	I couldn't be annulling
you couldn't be annulling
she couldn't be annulling
we couldn't be annulling
you couldn't be annulling
they couldn't be annulling	I couldn't have annulled
you couldn't have annulled
she couldn't have annulled
we couldn't have annulled
you couldn't have annulled
they couldn't have annulled	I couldn't have been annulling
you couldn't have been annulling
she couldn't have been annulling
we couldn't have been annulling
you couldn't have been annulling
they couldn't have been annulling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I annul?
could you annul?
could she annul?
could we annul?
could you annul?
could they annul? 	could I be annulling?
could you be annulling?
could she be annulling?
could we be annulling?
could you be annulling?
could they be annulling? 	could I have annulled?
could you have annulled?
could she have annulled?
could we have annulled?
could you have annulled?
could they have annulled? 	could I have been annulling?
could you have been annulling?
could she have been annulling?
could we have been annulling?
could you have been annulling?
could they have been annulling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I annul?
couldn't you annul?
couldn't she annul?
couldn't we annul?
couldn't you annul?
couldn't they annul? 	couldn't I be annulling?
couldn't you be annulling?
couldn't she be annulling?
couldn't we be annulling?
couldn't you be annulling?
couldn't they be annulling? 	couldn't I have annulled?
couldn't you have annulled?
couldn't she have annulled?
couldn't we have annulled?
couldn't you have annulled?
couldn't they have annulled? 	couldn't I have been annulling?
couldn't you have been annulling?
couldn't she have been annulling?
couldn't we have been annulling?
couldn't you have been annulling?
couldn't they have been annulling?