could subspecialize
Verbo regular: subspecialize - subspecialized- subspecialized

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could subspecialize
you could subspecialize
he could subspecialize
we could subspecialize
you could subspecialize
they could subspecialize 	I could be subspecializing
you could be subspecializing
he could be subspecializing
we could be subspecializing
you could be subspecializing
they could be subspecializing	I could have subspecialized
you could have subspecialized
he could have subspecialized
we could have subspecialized
you could have subspecialized
they could have subspecialized	I could have been subspecializing
you could have been subspecializing
he could have been subspecializing
we could have been subspecializing
you could have been subspecializing
they could have been subspecializing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't subspecialize
you couldn't subspecialize
he couldn't subspecialize
we couldn't subspecialize
you couldn't subspecialize
they couldn't subspecialize 	I couldn't be subspecializing
you couldn't be subspecializing
he couldn't be subspecializing
we couldn't be subspecializing
you couldn't be subspecializing
they couldn't be subspecializing	I couldn't have subspecialized
you couldn't have subspecialized
he couldn't have subspecialized
we couldn't have subspecialized
you couldn't have subspecialized
they couldn't have subspecialized	I couldn't have been subspecializing
you couldn't have been subspecializing
he couldn't have been subspecializing
we couldn't have been subspecializing
you couldn't have been subspecializing
they couldn't have been subspecializing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I subspecialize?
could you subspecialize?
could he subspecialize?
could we subspecialize?
could you subspecialize?
could they subspecialize? 	could I be subspecializing?
could you be subspecializing?
could he be subspecializing?
could we be subspecializing?
could you be subspecializing?
could they be subspecializing? 	could I have subspecialized?
could you have subspecialized?
could he have subspecialized?
could we have subspecialized?
could you have subspecialized?
could they have subspecialized? 	could I have been subspecializing?
could you have been subspecializing?
could he have been subspecializing?
could we have been subspecializing?
could you have been subspecializing?
could they have been subspecializing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I subspecialize?
couldn't you subspecialize?
couldn't he subspecialize?
couldn't we subspecialize?
couldn't you subspecialize?
couldn't they subspecialize? 	couldn't I be subspecializing?
couldn't you be subspecializing?
couldn't he be subspecializing?
couldn't we be subspecializing?
couldn't you be subspecializing?
couldn't they be subspecializing? 	couldn't I have subspecialized?
couldn't you have subspecialized?
couldn't he have subspecialized?
couldn't we have subspecialized?
couldn't you have subspecialized?
couldn't they have subspecialized? 	couldn't I have been subspecializing?
couldn't you have been subspecializing?
couldn't he have been subspecializing?
couldn't we have been subspecializing?
couldn't you have been subspecializing?
couldn't they have been subspecializing?