Conjugação do verbo inglês
COULD BACKCROSS

Verbo regular: backcross - backcrossed - backcrossed

Afirmação

Forma simple	Forma com V-ing
I could backcross you could backcross he could backcross we could backcross you could backcross they could backcross	I could be backcrossing you could be backcrossing he could be backcrossing we could be backcrossing you could be backcrossing they could be backcrossing
Perfeito	Perfeito com V-ing
I could have backcrossed you could have backcrossed he could have backcrossed we could have backcrossed you could have backcrossed they could have backcrossed	I could have been backcrossing you could have been backcrossing he could have been backcrossing we could have been backcrossing you could have been backcrossing they could have been backcrossing

Negação

Forma simple	Forma com V-ing
I could not backcross you could not backcross he could not backcross we could not backcross you could not backcross they could not backcross	I could not be backcrossing you could not be backcrossing he could not be backcrossing we could not be backcrossing you could not be backcrossing they could not be backcrossing
Perfeito	Perfeito com V-ing
I could not have backcrossed you could not have backcrossed he could not have backcrossed we could not have backcrossed you could not have backcrossed they could not have backcrossed	I could not have been backcrossing you could not have been backcrossing he could not have been backcrossing we could not have been backcrossing you could not have been backcrossing they could not have been backcrossing

Forma interrogativa

Forma simple	Forma com V-ing
could I backcross? could you backcross? could he backcross? could we backcross? could you backcross? could they backcross?	could I be backcrossing? could you be backcrossing? could he be backcrossing? could we be backcrossing? could you be backcrossing? could they be backcrossing?
Perfeito	Perfeito com V-ing
could I have backcrossed? could you have backcrossed? could he have backcrossed? could we have backcrossed? could you have backcrossed? could they have backcrossed?	could I have been backcrossing? could you have been backcrossing? could he have been backcrossing? could we have been backcrossing? could you have been backcrossing? could they have been backcrossing?

Forma interro-Negação

Forma simple	Forma com V-ing
could I not backcross? could you not backcross? could he not backcross? could we not backcross? could you not backcross? could they not backcross?	could I not be backcrossing? could you not be backcrossing? could he not be backcrossing? could we not be backcrossing? could you not be backcrossing? could they not be backcrossing?
Perfeito	Perfeito com V-ing
could I not have backcrossed? could you not have backcrossed? could he not have backcrossed? could we not have backcrossed? could you not have backcrossed? could they not have backcrossed?	could I not have been backcrossing? could you not have been backcrossing? could he not have been backcrossing? could we not have been backcrossing? could you not have been backcrossing? could they not have been backcrossing?