could glower
Verbo regular: glower - glowered- glowered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could glower
you could glower
he could glower
we could glower
you could glower
they could glower 	I could be glowering
you could be glowering
he could be glowering
we could be glowering
you could be glowering
they could be glowering	I could have glowered
you could have glowered
he could have glowered
we could have glowered
you could have glowered
they could have glowered	I could have been glowering
you could have been glowering
he could have been glowering
we could have been glowering
you could have been glowering
they could have been glowering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't glower
you couldn't glower
he couldn't glower
we couldn't glower
you couldn't glower
they couldn't glower 	I couldn't be glowering
you couldn't be glowering
he couldn't be glowering
we couldn't be glowering
you couldn't be glowering
they couldn't be glowering	I couldn't have glowered
you couldn't have glowered
he couldn't have glowered
we couldn't have glowered
you couldn't have glowered
they couldn't have glowered	I couldn't have been glowering
you couldn't have been glowering
he couldn't have been glowering
we couldn't have been glowering
you couldn't have been glowering
they couldn't have been glowering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I glower?
could you glower?
could he glower?
could we glower?
could you glower?
could they glower? 	could I be glowering?
could you be glowering?
could he be glowering?
could we be glowering?
could you be glowering?
could they be glowering? 	could I have glowered?
could you have glowered?
could he have glowered?
could we have glowered?
could you have glowered?
could they have glowered? 	could I have been glowering?
could you have been glowering?
could he have been glowering?
could we have been glowering?
could you have been glowering?
could they have been glowering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I glower?
couldn't you glower?
couldn't he glower?
couldn't we glower?
couldn't you glower?
couldn't they glower? 	couldn't I be glowering?
couldn't you be glowering?
couldn't he be glowering?
couldn't we be glowering?
couldn't you be glowering?
couldn't they be glowering? 	couldn't I have glowered?
couldn't you have glowered?
couldn't he have glowered?
couldn't we have glowered?
couldn't you have glowered?
couldn't they have glowered? 	couldn't I have been glowering?
couldn't you have been glowering?
couldn't he have been glowering?
couldn't we have been glowering?
couldn't you have been glowering?
couldn't they have been glowering?