Conjugação do verbo inglês
COULD ROLF

Verbo regular: rolf - rolfed - rolfed

Afirmação

Forma simple	Forma com V-ing
I could rolf you could rolf she could rolf we could rolf you could rolf they could rolf	I could be rolfing you could be rolfing she could be rolfing we could be rolfing you could be rolfing they could be rolfing
Perfeito	Perfeito com V-ing
I could have rolfed you could have rolfed she could have rolfed we could have rolfed you could have rolfed they could have rolfed	I could have been rolfing you could have been rolfing she could have been rolfing we could have been rolfing you could have been rolfing they could have been rolfing

Negação

Forma simple	Forma com V-ing
I could not rolf you could not rolf she could not rolf we could not rolf you could not rolf they could not rolf	I could not be rolfing you could not be rolfing she could not be rolfing we could not be rolfing you could not be rolfing they could not be rolfing
Perfeito	Perfeito com V-ing
I could not have rolfed you could not have rolfed she could not have rolfed we could not have rolfed you could not have rolfed they could not have rolfed	I could not have been rolfing you could not have been rolfing she could not have been rolfing we could not have been rolfing you could not have been rolfing they could not have been rolfing

Forma interrogativa

Forma simple	Forma com V-ing
could I rolf? could you rolf? could she rolf? could we rolf? could you rolf? could they rolf?	could I be rolfing? could you be rolfing? could she be rolfing? could we be rolfing? could you be rolfing? could they be rolfing?
Perfeito	Perfeito com V-ing
could I have rolfed? could you have rolfed? could she have rolfed? could we have rolfed? could you have rolfed? could they have rolfed?	could I have been rolfing? could you have been rolfing? could she have been rolfing? could we have been rolfing? could you have been rolfing? could they have been rolfing?

Forma interro-Negação

Forma simple	Forma com V-ing
could I not rolf? could you not rolf? could she not rolf? could we not rolf? could you not rolf? could they not rolf?	could I not be rolfing? could you not be rolfing? could she not be rolfing? could we not be rolfing? could you not be rolfing? could they not be rolfing?
Perfeito	Perfeito com V-ing
could I not have rolfed? could you not have rolfed? could she not have rolfed? could we not have rolfed? could you not have rolfed? could they not have rolfed?	could I not have been rolfing? could you not have been rolfing? could she not have been rolfing? could we not have been rolfing? could you not have been rolfing? could they not have been rolfing?