could summer
Verbo regular: summer - summered- summered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could summer
you could summer
he could summer
we could summer
you could summer
they could summer 	I could be summering
you could be summering
he could be summering
we could be summering
you could be summering
they could be summering	I could have summered
you could have summered
he could have summered
we could have summered
you could have summered
they could have summered	I could have been summering
you could have been summering
he could have been summering
we could have been summering
you could have been summering
they could have been summering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't summer
you couldn't summer
he couldn't summer
we couldn't summer
you couldn't summer
they couldn't summer 	I couldn't be summering
you couldn't be summering
he couldn't be summering
we couldn't be summering
you couldn't be summering
they couldn't be summering	I couldn't have summered
you couldn't have summered
he couldn't have summered
we couldn't have summered
you couldn't have summered
they couldn't have summered	I couldn't have been summering
you couldn't have been summering
he couldn't have been summering
we couldn't have been summering
you couldn't have been summering
they couldn't have been summering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I summer?
could you summer?
could he summer?
could we summer?
could you summer?
could they summer? 	could I be summering?
could you be summering?
could he be summering?
could we be summering?
could you be summering?
could they be summering? 	could I have summered?
could you have summered?
could he have summered?
could we have summered?
could you have summered?
could they have summered? 	could I have been summering?
could you have been summering?
could he have been summering?
could we have been summering?
could you have been summering?
could they have been summering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I summer?
couldn't you summer?
couldn't he summer?
couldn't we summer?
couldn't you summer?
couldn't they summer? 	couldn't I be summering?
couldn't you be summering?
couldn't he be summering?
couldn't we be summering?
couldn't you be summering?
couldn't they be summering? 	couldn't I have summered?
couldn't you have summered?
couldn't he have summered?
couldn't we have summered?
couldn't you have summered?
couldn't they have summered? 	couldn't I have been summering?
couldn't you have been summering?
couldn't he have been summering?
couldn't we have been summering?
couldn't you have been summering?
couldn't they have been summering?