could glow
Verbo regular: glow - glowed- glowed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could glow
you could glow
he could glow
we could glow
you could glow
they could glow 	I could be glowing
you could be glowing
he could be glowing
we could be glowing
you could be glowing
they could be glowing	I could have glowed
you could have glowed
he could have glowed
we could have glowed
you could have glowed
they could have glowed	I could have been glowing
you could have been glowing
he could have been glowing
we could have been glowing
you could have been glowing
they could have been glowing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't glow
you couldn't glow
he couldn't glow
we couldn't glow
you couldn't glow
they couldn't glow 	I couldn't be glowing
you couldn't be glowing
he couldn't be glowing
we couldn't be glowing
you couldn't be glowing
they couldn't be glowing	I couldn't have glowed
you couldn't have glowed
he couldn't have glowed
we couldn't have glowed
you couldn't have glowed
they couldn't have glowed	I couldn't have been glowing
you couldn't have been glowing
he couldn't have been glowing
we couldn't have been glowing
you couldn't have been glowing
they couldn't have been glowing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I glow?
could you glow?
could he glow?
could we glow?
could you glow?
could they glow? 	could I be glowing?
could you be glowing?
could he be glowing?
could we be glowing?
could you be glowing?
could they be glowing? 	could I have glowed?
could you have glowed?
could he have glowed?
could we have glowed?
could you have glowed?
could they have glowed? 	could I have been glowing?
could you have been glowing?
could he have been glowing?
could we have been glowing?
could you have been glowing?
could they have been glowing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I glow?
couldn't you glow?
couldn't he glow?
couldn't we glow?
couldn't you glow?
couldn't they glow? 	couldn't I be glowing?
couldn't you be glowing?
couldn't he be glowing?
couldn't we be glowing?
couldn't you be glowing?
couldn't they be glowing? 	couldn't I have glowed?
couldn't you have glowed?
couldn't he have glowed?
couldn't we have glowed?
couldn't you have glowed?
couldn't they have glowed? 	couldn't I have been glowing?
couldn't you have been glowing?
couldn't he have been glowing?
couldn't we have been glowing?
couldn't you have been glowing?
couldn't they have been glowing?