could staff
Verbo regular: staff - staffed- staffed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could staff
you could staff
he could staff
we could staff
you could staff
they could staff 	I could be staffing
you could be staffing
he could be staffing
we could be staffing
you could be staffing
they could be staffing	I could have staffed
you could have staffed
he could have staffed
we could have staffed
you could have staffed
they could have staffed	I could have been staffing
you could have been staffing
he could have been staffing
we could have been staffing
you could have been staffing
they could have been staffing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't staff
you couldn't staff
he couldn't staff
we couldn't staff
you couldn't staff
they couldn't staff 	I couldn't be staffing
you couldn't be staffing
he couldn't be staffing
we couldn't be staffing
you couldn't be staffing
they couldn't be staffing	I couldn't have staffed
you couldn't have staffed
he couldn't have staffed
we couldn't have staffed
you couldn't have staffed
they couldn't have staffed	I couldn't have been staffing
you couldn't have been staffing
he couldn't have been staffing
we couldn't have been staffing
you couldn't have been staffing
they couldn't have been staffing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I staff?
could you staff?
could he staff?
could we staff?
could you staff?
could they staff? 	could I be staffing?
could you be staffing?
could he be staffing?
could we be staffing?
could you be staffing?
could they be staffing? 	could I have staffed?
could you have staffed?
could he have staffed?
could we have staffed?
could you have staffed?
could they have staffed? 	could I have been staffing?
could you have been staffing?
could he have been staffing?
could we have been staffing?
could you have been staffing?
could they have been staffing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I staff?
couldn't you staff?
couldn't he staff?
couldn't we staff?
couldn't you staff?
couldn't they staff? 	couldn't I be staffing?
couldn't you be staffing?
couldn't he be staffing?
couldn't we be staffing?
couldn't you be staffing?
couldn't they be staffing? 	couldn't I have staffed?
couldn't you have staffed?
couldn't he have staffed?
couldn't we have staffed?
couldn't you have staffed?
couldn't they have staffed? 	couldn't I have been staffing?
couldn't you have been staffing?
couldn't he have been staffing?
couldn't we have been staffing?
couldn't you have been staffing?
couldn't they have been staffing?