Conjugação do verbo inglês
COULD CHALLENGE

Verbo regular: challenge - challenged - challenged

Afirmação

Forma simple	Forma com V-ing
I could challenge you could challenge he could challenge we could challenge you could challenge they could challenge	I could be challenging you could be challenging he could be challenging we could be challenging you could be challenging they could be challenging
Perfeito	Perfeito com V-ing
I could have challenged you could have challenged he could have challenged we could have challenged you could have challenged they could have challenged	I could have been challenging you could have been challenging he could have been challenging we could have been challenging you could have been challenging they could have been challenging

Negação

Forma simple	Forma com V-ing
I could not challenge you could not challenge he could not challenge we could not challenge you could not challenge they could not challenge	I could not be challenging you could not be challenging he could not be challenging we could not be challenging you could not be challenging they could not be challenging
Perfeito	Perfeito com V-ing
I could not have challenged you could not have challenged he could not have challenged we could not have challenged you could not have challenged they could not have challenged	I could not have been challenging you could not have been challenging he could not have been challenging we could not have been challenging you could not have been challenging they could not have been challenging

Forma interrogativa

Forma simple	Forma com V-ing
could I challenge? could you challenge? could he challenge? could we challenge? could you challenge? could they challenge?	could I be challenging? could you be challenging? could he be challenging? could we be challenging? could you be challenging? could they be challenging?
Perfeito	Perfeito com V-ing
could I have challenged? could you have challenged? could he have challenged? could we have challenged? could you have challenged? could they have challenged?	could I have been challenging? could you have been challenging? could he have been challenging? could we have been challenging? could you have been challenging? could they have been challenging?

Forma interro-Negação

Forma simple	Forma com V-ing
could I not challenge? could you not challenge? could he not challenge? could we not challenge? could you not challenge? could they not challenge?	could I not be challenging? could you not be challenging? could he not be challenging? could we not be challenging? could you not be challenging? could they not be challenging?
Perfeito	Perfeito com V-ing
could I not have challenged? could you not have challenged? could he not have challenged? could we not have challenged? could you not have challenged? could they not have challenged?	could I not have been challenging? could you not have been challenging? could he not have been challenging? could we not have been challenging? could you not have been challenging? could they not have been challenging?