could serialize
Verbo regular: serialize - serialized- serialized

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could serialize
you could serialize
he could serialize
we could serialize
you could serialize
they could serialize 	I could be serializing
you could be serializing
he could be serializing
we could be serializing
you could be serializing
they could be serializing	I could have serialized
you could have serialized
he could have serialized
we could have serialized
you could have serialized
they could have serialized	I could have been serializing
you could have been serializing
he could have been serializing
we could have been serializing
you could have been serializing
they could have been serializing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't serialize
you couldn't serialize
he couldn't serialize
we couldn't serialize
you couldn't serialize
they couldn't serialize 	I couldn't be serializing
you couldn't be serializing
he couldn't be serializing
we couldn't be serializing
you couldn't be serializing
they couldn't be serializing	I couldn't have serialized
you couldn't have serialized
he couldn't have serialized
we couldn't have serialized
you couldn't have serialized
they couldn't have serialized	I couldn't have been serializing
you couldn't have been serializing
he couldn't have been serializing
we couldn't have been serializing
you couldn't have been serializing
they couldn't have been serializing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I serialize?
could you serialize?
could he serialize?
could we serialize?
could you serialize?
could they serialize? 	could I be serializing?
could you be serializing?
could he be serializing?
could we be serializing?
could you be serializing?
could they be serializing? 	could I have serialized?
could you have serialized?
could he have serialized?
could we have serialized?
could you have serialized?
could they have serialized? 	could I have been serializing?
could you have been serializing?
could he have been serializing?
could we have been serializing?
could you have been serializing?
could they have been serializing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I serialize?
couldn't you serialize?
couldn't he serialize?
couldn't we serialize?
couldn't you serialize?
couldn't they serialize? 	couldn't I be serializing?
couldn't you be serializing?
couldn't he be serializing?
couldn't we be serializing?
couldn't you be serializing?
couldn't they be serializing? 	couldn't I have serialized?
couldn't you have serialized?
couldn't he have serialized?
couldn't we have serialized?
couldn't you have serialized?
couldn't they have serialized? 	couldn't I have been serializing?
couldn't you have been serializing?
couldn't he have been serializing?
couldn't we have been serializing?
couldn't you have been serializing?
couldn't they have been serializing?