could arc
Verbo regular: arc - arced- arced

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could arc
you could arc
she could arc
we could arc
you could arc
they could arc 	I could be arcing
you could be arcing
she could be arcing
we could be arcing
you could be arcing
they could be arcing	I could have arced
you could have arced
she could have arced
we could have arced
you could have arced
they could have arced	I could have been arcing
you could have been arcing
she could have been arcing
we could have been arcing
you could have been arcing
they could have been arcing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't arc
you couldn't arc
she couldn't arc
we couldn't arc
you couldn't arc
they couldn't arc 	I couldn't be arcing
you couldn't be arcing
she couldn't be arcing
we couldn't be arcing
you couldn't be arcing
they couldn't be arcing	I couldn't have arced
you couldn't have arced
she couldn't have arced
we couldn't have arced
you couldn't have arced
they couldn't have arced	I couldn't have been arcing
you couldn't have been arcing
she couldn't have been arcing
we couldn't have been arcing
you couldn't have been arcing
they couldn't have been arcing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I arc?
could you arc?
could she arc?
could we arc?
could you arc?
could they arc? 	could I be arcing?
could you be arcing?
could she be arcing?
could we be arcing?
could you be arcing?
could they be arcing? 	could I have arced?
could you have arced?
could she have arced?
could we have arced?
could you have arced?
could they have arced? 	could I have been arcing?
could you have been arcing?
could she have been arcing?
could we have been arcing?
could you have been arcing?
could they have been arcing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I arc?
couldn't you arc?
couldn't she arc?
couldn't we arc?
couldn't you arc?
couldn't they arc? 	couldn't I be arcing?
couldn't you be arcing?
couldn't she be arcing?
couldn't we be arcing?
couldn't you be arcing?
couldn't they be arcing? 	couldn't I have arced?
couldn't you have arced?
couldn't she have arced?
couldn't we have arced?
couldn't you have arced?
couldn't they have arced? 	couldn't I have been arcing?
couldn't you have been arcing?
couldn't she have been arcing?
couldn't we have been arcing?
couldn't you have been arcing?
couldn't they have been arcing?