could sever
Verbo regular: sever - severed- severed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could sever
you could sever
he could sever
we could sever
you could sever
they could sever 	I could be severing
you could be severing
he could be severing
we could be severing
you could be severing
they could be severing	I could have severed
you could have severed
he could have severed
we could have severed
you could have severed
they could have severed	I could have been severing
you could have been severing
he could have been severing
we could have been severing
you could have been severing
they could have been severing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't sever
you couldn't sever
he couldn't sever
we couldn't sever
you couldn't sever
they couldn't sever 	I couldn't be severing
you couldn't be severing
he couldn't be severing
we couldn't be severing
you couldn't be severing
they couldn't be severing	I couldn't have severed
you couldn't have severed
he couldn't have severed
we couldn't have severed
you couldn't have severed
they couldn't have severed	I couldn't have been severing
you couldn't have been severing
he couldn't have been severing
we couldn't have been severing
you couldn't have been severing
they couldn't have been severing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I sever?
could you sever?
could he sever?
could we sever?
could you sever?
could they sever? 	could I be severing?
could you be severing?
could he be severing?
could we be severing?
could you be severing?
could they be severing? 	could I have severed?
could you have severed?
could he have severed?
could we have severed?
could you have severed?
could they have severed? 	could I have been severing?
could you have been severing?
could he have been severing?
could we have been severing?
could you have been severing?
could they have been severing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I sever?
couldn't you sever?
couldn't he sever?
couldn't we sever?
couldn't you sever?
couldn't they sever? 	couldn't I be severing?
couldn't you be severing?
couldn't he be severing?
couldn't we be severing?
couldn't you be severing?
couldn't they be severing? 	couldn't I have severed?
couldn't you have severed?
couldn't he have severed?
couldn't we have severed?
couldn't you have severed?
couldn't they have severed? 	couldn't I have been severing?
couldn't you have been severing?
couldn't he have been severing?
couldn't we have been severing?
couldn't you have been severing?
couldn't they have been severing?