could mess
Verbo regular: mess - messed- messed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could mess
you could mess
she could mess
we could mess
you could mess
they could mess 	I could be messing
you could be messing
she could be messing
we could be messing
you could be messing
they could be messing	I could have messed
you could have messed
she could have messed
we could have messed
you could have messed
they could have messed	I could have been messing
you could have been messing
she could have been messing
we could have been messing
you could have been messing
they could have been messing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't mess
you couldn't mess
she couldn't mess
we couldn't mess
you couldn't mess
they couldn't mess 	I couldn't be messing
you couldn't be messing
she couldn't be messing
we couldn't be messing
you couldn't be messing
they couldn't be messing	I couldn't have messed
you couldn't have messed
she couldn't have messed
we couldn't have messed
you couldn't have messed
they couldn't have messed	I couldn't have been messing
you couldn't have been messing
she couldn't have been messing
we couldn't have been messing
you couldn't have been messing
they couldn't have been messing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I mess?
could you mess?
could she mess?
could we mess?
could you mess?
could they mess? 	could I be messing?
could you be messing?
could she be messing?
could we be messing?
could you be messing?
could they be messing? 	could I have messed?
could you have messed?
could she have messed?
could we have messed?
could you have messed?
could they have messed? 	could I have been messing?
could you have been messing?
could she have been messing?
could we have been messing?
could you have been messing?
could they have been messing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I mess?
couldn't you mess?
couldn't she mess?
couldn't we mess?
couldn't you mess?
couldn't they mess? 	couldn't I be messing?
couldn't you be messing?
couldn't she be messing?
couldn't we be messing?
couldn't you be messing?
couldn't they be messing? 	couldn't I have messed?
couldn't you have messed?
couldn't she have messed?
couldn't we have messed?
couldn't you have messed?
couldn't they have messed? 	couldn't I have been messing?
couldn't you have been messing?
couldn't she have been messing?
couldn't we have been messing?
couldn't you have been messing?
couldn't they have been messing?