could annul
Verbo regular: annul - annulled- annulled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could annul
you could annul
he could annul
we could annul
you could annul
they could annul 	I could be annulling
you could be annulling
he could be annulling
we could be annulling
you could be annulling
they could be annulling	I could have annulled
you could have annulled
he 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
he could have been annulling
we could have been annulling
you could have been annulling
they could have been annulling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't annul
you couldn't annul
he 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
he 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
he 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
he couldn't have been annulling
we couldn't have been annulling
you couldn't have been annulling
they couldn't have been annulling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I annul?
could you annul?
could he annul?
could we annul?
could you annul?
could they annul? 	could I be annulling?
could you be annulling?
could he be annulling?
could we be annulling?
could you be annulling?
could they be annulling? 	could I have annulled?
could you have annulled?
could he 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 he have been annulling?
could we have been annulling?
could you have been annulling?
could they have been annulling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I annul?
couldn't you annul?
couldn't he 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 he 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 he 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 he have been annulling?
couldn't we have been annulling?
couldn't you have been annulling?
couldn't they have been annulling?