could shortwave
Verbo regular: shortwave - shortwaved- shortwaved

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could shortwave
you could shortwave
he could shortwave
we could shortwave
you could shortwave
they could shortwave 	I could be shortwaving
you could be shortwaving
he could be shortwaving
we could be shortwaving
you could be shortwaving
they could be shortwaving	I could have shortwaved
you could have shortwaved
he could have shortwaved
we could have shortwaved
you could have shortwaved
they could have shortwaved	I could have been shortwaving
you could have been shortwaving
he could have been shortwaving
we could have been shortwaving
you could have been shortwaving
they could have been shortwaving	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't shortwave
you couldn't shortwave
he couldn't shortwave
we couldn't shortwave
you couldn't shortwave
they couldn't shortwave 	I couldn't be shortwaving
you couldn't be shortwaving
he couldn't be shortwaving
we couldn't be shortwaving
you couldn't be shortwaving
they couldn't be shortwaving	I couldn't have shortwaved
you couldn't have shortwaved
he couldn't have shortwaved
we couldn't have shortwaved
you couldn't have shortwaved
they couldn't have shortwaved	I couldn't have been shortwaving
you couldn't have been shortwaving
he couldn't have been shortwaving
we couldn't have been shortwaving
you couldn't have been shortwaving
they couldn't have been shortwaving	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I shortwave?
could you shortwave?
could he shortwave?
could we shortwave?
could you shortwave?
could they shortwave? 	could I be shortwaving?
could you be shortwaving?
could he be shortwaving?
could we be shortwaving?
could you be shortwaving?
could they be shortwaving? 	could I have shortwaved?
could you have shortwaved?
could he have shortwaved?
could we have shortwaved?
could you have shortwaved?
could they have shortwaved? 	could I have been shortwaving?
could you have been shortwaving?
could he have been shortwaving?
could we have been shortwaving?
could you have been shortwaving?
could they have been shortwaving? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I shortwave?
couldn't you shortwave?
couldn't he shortwave?
couldn't we shortwave?
couldn't you shortwave?
couldn't they shortwave? 	couldn't I be shortwaving?
couldn't you be shortwaving?
couldn't he be shortwaving?
couldn't we be shortwaving?
couldn't you be shortwaving?
couldn't they be shortwaving? 	couldn't I have shortwaved?
couldn't you have shortwaved?
couldn't he have shortwaved?
couldn't we have shortwaved?
couldn't you have shortwaved?
couldn't they have shortwaved? 	couldn't I have been shortwaving?
couldn't you have been shortwaving?
couldn't he have been shortwaving?
couldn't we have been shortwaving?
couldn't you have been shortwaving?
couldn't they have been shortwaving?