could water-ski
Verbo regular: water-ski - water-skied- water-skied

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could water-ski
you could water-ski
he could water-ski
we could water-ski
you could water-ski
they could water-ski 	I could be water-skiing
you could be water-skiing
he could be water-skiing
we could be water-skiing
you could be water-skiing
they could be water-skiing	I could have water-skied
you could have water-skied
he could have water-skied
we could have water-skied
you could have water-skied
they could have water-skied	I could have been water-skiing
you could have been water-skiing
he could have been water-skiing
we could have been water-skiing
you could have been water-skiing
they could have been water-skiing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not water-ski
you could not water-ski
he could not water-ski
we could not water-ski
you could not water-ski
they could not water-ski 	I could not be water-skiing
you could not be water-skiing
he could not be water-skiing
we could not be water-skiing
you could not be water-skiing
they could not be water-skiing	I could not have water-skied
you could not have water-skied
he could not have water-skied
we could not have water-skied
you could not have water-skied
they could not have water-skied	I could not have been water-skiing
you could not have been water-skiing
he could not have been water-skiing
we could not have been water-skiing
you could not have been water-skiing
they could not have been water-skiing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I water-ski?
could you water-ski?
could he water-ski?
could we water-ski?
could you water-ski?
could they water-ski? 	could I be water-skiing?
could you be water-skiing?
could he be water-skiing?
could we be water-skiing?
could you be water-skiing?
could they be water-skiing? 	could I have water-skied?
could you have water-skied?
could he have water-skied?
could we have water-skied?
could you have water-skied?
could they have water-skied? 	could I have been water-skiing?
could you have been water-skiing?
could he have been water-skiing?
could we have been water-skiing?
could you have been water-skiing?
could they have been water-skiing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not water-ski?
could you not water-ski?
could he not water-ski?
could we not water-ski?
could you not water-ski?
could they not water-ski? 	could I not be water-skiing?
could you not be water-skiing?
could he not be water-skiing?
could we not be water-skiing?
could you not be water-skiing?
could they not be water-skiing? 	could I not have water-skied?
could you not have water-skied?
could he not have water-skied?
could we not have water-skied?
could you not have water-skied?
could they not have water-skied? 	could I not have been water-skiing?
could you not have been water-skiing?
could he not have been water-skiing?
could we not have been water-skiing?
could you not have been water-skiing?
could they not have been water-skiing?