Conjugação do verbo inglês
COULD HEADBUTT

Verbo regular: headbutt - headbutted - headbutted

Afirmação

Forma simple	Forma com V-ing
I could headbutt you could headbutt he could headbutt we could headbutt you could headbutt they could headbutt	I could be headbutting you could be headbutting he could be headbutting we could be headbutting you could be headbutting they could be headbutting
Perfeito	Perfeito com V-ing
I could have headbutted you could have headbutted he could have headbutted we could have headbutted you could have headbutted they could have headbutted	I could have been headbutting you could have been headbutting he could have been headbutting we could have been headbutting you could have been headbutting they could have been headbutting

Negação

Forma simple	Forma com V-ing
I could not headbutt you could not headbutt he could not headbutt we could not headbutt you could not headbutt they could not headbutt	I could not be headbutting you could not be headbutting he could not be headbutting we could not be headbutting you could not be headbutting they could not be headbutting
Perfeito	Perfeito com V-ing
I could not have headbutted you could not have headbutted he could not have headbutted we could not have headbutted you could not have headbutted they could not have headbutted	I could not have been headbutting you could not have been headbutting he could not have been headbutting we could not have been headbutting you could not have been headbutting they could not have been headbutting

Forma interrogativa

Forma simple	Forma com V-ing
could I headbutt? could you headbutt? could he headbutt? could we headbutt? could you headbutt? could they headbutt?	could I be headbutting? could you be headbutting? could he be headbutting? could we be headbutting? could you be headbutting? could they be headbutting?
Perfeito	Perfeito com V-ing
could I have headbutted? could you have headbutted? could he have headbutted? could we have headbutted? could you have headbutted? could they have headbutted?	could I have been headbutting? could you have been headbutting? could he have been headbutting? could we have been headbutting? could you have been headbutting? could they have been headbutting?

Forma interro-Negação

Forma simple	Forma com V-ing
could I not headbutt? could you not headbutt? could he not headbutt? could we not headbutt? could you not headbutt? could they not headbutt?	could I not be headbutting? could you not be headbutting? could he not be headbutting? could we not be headbutting? could you not be headbutting? could they not be headbutting?
Perfeito	Perfeito com V-ing
could I not have headbutted? could you not have headbutted? could he not have headbutted? could we not have headbutted? could you not have headbutted? could they not have headbutted?	could I not have been headbutting? could you not have been headbutting? could he not have been headbutting? could we not have been headbutting? could you not have been headbutting? could they not have been headbutting?