Conjugação do verbo inglês
COULD BIFF

Verbo regular: biff - biffed - biffed

Afirmação

Forma simple	Forma com V-ing
I could biff you could biff she could biff we could biff you could biff they could biff	I could be biffing you could be biffing she could be biffing we could be biffing you could be biffing they could be biffing
Perfeito	Perfeito com V-ing
I could have biffed you could have biffed she could have biffed we could have biffed you could have biffed they could have biffed	I could have been biffing you could have been biffing she could have been biffing we could have been biffing you could have been biffing they could have been biffing

Negação

Forma simple	Forma com V-ing
I could not biff you could not biff she could not biff we could not biff you could not biff they could not biff	I could not be biffing you could not be biffing she could not be biffing we could not be biffing you could not be biffing they could not be biffing
Perfeito	Perfeito com V-ing
I could not have biffed you could not have biffed she could not have biffed we could not have biffed you could not have biffed they could not have biffed	I could not have been biffing you could not have been biffing she could not have been biffing we could not have been biffing you could not have been biffing they could not have been biffing

Forma interrogativa

Forma simple	Forma com V-ing
could I biff? could you biff? could she biff? could we biff? could you biff? could they biff?	could I be biffing? could you be biffing? could she be biffing? could we be biffing? could you be biffing? could they be biffing?
Perfeito	Perfeito com V-ing
could I have biffed? could you have biffed? could she have biffed? could we have biffed? could you have biffed? could they have biffed?	could I have been biffing? could you have been biffing? could she have been biffing? could we have been biffing? could you have been biffing? could they have been biffing?

Forma interro-Negação

Forma simple	Forma com V-ing
could I not biff? could you not biff? could she not biff? could we not biff? could you not biff? could they not biff?	could I not be biffing? could you not be biffing? could she not be biffing? could we not be biffing? could you not be biffing? could they not be biffing?
Perfeito	Perfeito com V-ing
could I not have biffed? could you not have biffed? could she not have biffed? could we not have biffed? could you not have biffed? could they not have biffed?	could I not have been biffing? could you not have been biffing? could she not have been biffing? could we not have been biffing? could you not have been biffing? could they not have been biffing?