could contest
Verbo regular: contest - contested- contested

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could contest
you could contest
he could contest
we could contest
you could contest
they could contest 	I could be contesting
you could be contesting
he could be contesting
we could be contesting
you could be contesting
they could be contesting	I could have contested
you could have contested
he could have contested
we could have contested
you could have contested
they could have contested	I could have been contesting
you could have been contesting
he could have been contesting
we could have been contesting
you could have been contesting
they could have been contesting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not contest
you could not contest
he could not contest
we could not contest
you could not contest
they could not contest 	I could not be contesting
you could not be contesting
he could not be contesting
we could not be contesting
you could not be contesting
they could not be contesting	I could not have contested
you could not have contested
he could not have contested
we could not have contested
you could not have contested
they could not have contested	I could not have been contesting
you could not have been contesting
he could not have been contesting
we could not have been contesting
you could not have been contesting
they could not have been contesting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I contest?
could you contest?
could he contest?
could we contest?
could you contest?
could they contest? 	could I be contesting?
could you be contesting?
could he be contesting?
could we be contesting?
could you be contesting?
could they be contesting? 	could I have contested?
could you have contested?
could he have contested?
could we have contested?
could you have contested?
could they have contested? 	could I have been contesting?
could you have been contesting?
could he have been contesting?
could we have been contesting?
could you have been contesting?
could they have been contesting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not contest?
could you not contest?
could he not contest?
could we not contest?
could you not contest?
could they not contest? 	could I not be contesting?
could you not be contesting?
could he not be contesting?
could we not be contesting?
could you not be contesting?
could they not be contesting? 	could I not have contested?
could you not have contested?
could he not have contested?
could we not have contested?
could you not have contested?
could they not have contested? 	could I not have been contesting?
could you not have been contesting?
could he not have been contesting?
could we not have been contesting?
could you not have been contesting?
could they not have been contesting?