could overfill
Verbo regular: overfill - overfilled- overfilled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could overfill
you could overfill
she could overfill
we could overfill
you could overfill
they could overfill 	I could be overfilling
you could be overfilling
she could be overfilling
we could be overfilling
you could be overfilling
they could be overfilling	I could have overfilled
you could have overfilled
she could have overfilled
we could have overfilled
you could have overfilled
they could have overfilled	I could have been overfilling
you could have been overfilling
she could have been overfilling
we could have been overfilling
you could have been overfilling
they could have been overfilling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't overfill
you couldn't overfill
she couldn't overfill
we couldn't overfill
you couldn't overfill
they couldn't overfill 	I couldn't be overfilling
you couldn't be overfilling
she couldn't be overfilling
we couldn't be overfilling
you couldn't be overfilling
they couldn't be overfilling	I couldn't have overfilled
you couldn't have overfilled
she couldn't have overfilled
we couldn't have overfilled
you couldn't have overfilled
they couldn't have overfilled	I couldn't have been overfilling
you couldn't have been overfilling
she couldn't have been overfilling
we couldn't have been overfilling
you couldn't have been overfilling
they couldn't have been overfilling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I overfill?
could you overfill?
could she overfill?
could we overfill?
could you overfill?
could they overfill? 	could I be overfilling?
could you be overfilling?
could she be overfilling?
could we be overfilling?
could you be overfilling?
could they be overfilling? 	could I have overfilled?
could you have overfilled?
could she have overfilled?
could we have overfilled?
could you have overfilled?
could they have overfilled? 	could I have been overfilling?
could you have been overfilling?
could she have been overfilling?
could we have been overfilling?
could you have been overfilling?
could they have been overfilling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I overfill?
couldn't you overfill?
couldn't she overfill?
couldn't we overfill?
couldn't you overfill?
couldn't they overfill? 	couldn't I be overfilling?
couldn't you be overfilling?
couldn't she be overfilling?
couldn't we be overfilling?
couldn't you be overfilling?
couldn't they be overfilling? 	couldn't I have overfilled?
couldn't you have overfilled?
couldn't she have overfilled?
couldn't we have overfilled?
couldn't you have overfilled?
couldn't they have overfilled? 	couldn't I have been overfilling?
couldn't you have been overfilling?
couldn't she have been overfilling?
couldn't we have been overfilling?
couldn't you have been overfilling?
couldn't they have been overfilling?