could fulfill
Verbo regular: fulfill - fulfilled- fulfilled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could fulfill
you could fulfill
he could fulfill
we could fulfill
you could fulfill
they could fulfill 	I could be fulfilling
you could be fulfilling
he could be fulfilling
we could be fulfilling
you could be fulfilling
they could be fulfilling	I could have fulfilled
you could have fulfilled
he could have fulfilled
we could have fulfilled
you could have fulfilled
they could have fulfilled	I could have been fulfilling
you could have been fulfilling
he could have been fulfilling
we could have been fulfilling
you could have been fulfilling
they could have been fulfilling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't fulfill
you couldn't fulfill
he couldn't fulfill
we couldn't fulfill
you couldn't fulfill
they couldn't fulfill 	I couldn't be fulfilling
you couldn't be fulfilling
he couldn't be fulfilling
we couldn't be fulfilling
you couldn't be fulfilling
they couldn't be fulfilling	I couldn't have fulfilled
you couldn't have fulfilled
he couldn't have fulfilled
we couldn't have fulfilled
you couldn't have fulfilled
they couldn't have fulfilled	I couldn't have been fulfilling
you couldn't have been fulfilling
he couldn't have been fulfilling
we couldn't have been fulfilling
you couldn't have been fulfilling
they couldn't have been fulfilling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I fulfill?
could you fulfill?
could he fulfill?
could we fulfill?
could you fulfill?
could they fulfill? 	could I be fulfilling?
could you be fulfilling?
could he be fulfilling?
could we be fulfilling?
could you be fulfilling?
could they be fulfilling? 	could I have fulfilled?
could you have fulfilled?
could he have fulfilled?
could we have fulfilled?
could you have fulfilled?
could they have fulfilled? 	could I have been fulfilling?
could you have been fulfilling?
could he have been fulfilling?
could we have been fulfilling?
could you have been fulfilling?
could they have been fulfilling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I fulfill?
couldn't you fulfill?
couldn't he fulfill?
couldn't we fulfill?
couldn't you fulfill?
couldn't they fulfill? 	couldn't I be fulfilling?
couldn't you be fulfilling?
couldn't he be fulfilling?
couldn't we be fulfilling?
couldn't you be fulfilling?
couldn't they be fulfilling? 	couldn't I have fulfilled?
couldn't you have fulfilled?
couldn't he have fulfilled?
couldn't we have fulfilled?
couldn't you have fulfilled?
couldn't they have fulfilled? 	couldn't I have been fulfilling?
couldn't you have been fulfilling?
couldn't he have been fulfilling?
couldn't we have been fulfilling?
couldn't you have been fulfilling?
couldn't they have been fulfilling?