could develop
Verbo regular: develop - developed- developed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could develop
you could develop
he could develop
we could develop
you could develop
they could develop 	I could be developing
you could be developing
he could be developing
we could be developing
you could be developing
they could be developing	I could have developed
you could have developed
he could have developed
we could have developed
you could have developed
they could have developed	I could have been developing
you could have been developing
he could have been developing
we could have been developing
you could have been developing
they could have been developing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't develop
you couldn't develop
he couldn't develop
we couldn't develop
you couldn't develop
they couldn't develop 	I couldn't be developing
you couldn't be developing
he couldn't be developing
we couldn't be developing
you couldn't be developing
they couldn't be developing	I couldn't have developed
you couldn't have developed
he couldn't have developed
we couldn't have developed
you couldn't have developed
they couldn't have developed	I couldn't have been developing
you couldn't have been developing
he couldn't have been developing
we couldn't have been developing
you couldn't have been developing
they couldn't have been developing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I develop?
could you develop?
could he develop?
could we develop?
could you develop?
could they develop? 	could I be developing?
could you be developing?
could he be developing?
could we be developing?
could you be developing?
could they be developing? 	could I have developed?
could you have developed?
could he have developed?
could we have developed?
could you have developed?
could they have developed? 	could I have been developing?
could you have been developing?
could he have been developing?
could we have been developing?
could you have been developing?
could they have been developing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I develop?
couldn't you develop?
couldn't he develop?
couldn't we develop?
couldn't you develop?
couldn't they develop? 	couldn't I be developing?
couldn't you be developing?
couldn't he be developing?
couldn't we be developing?
couldn't you be developing?
couldn't they be developing? 	couldn't I have developed?
couldn't you have developed?
couldn't he have developed?
couldn't we have developed?
couldn't you have developed?
couldn't they have developed? 	couldn't I have been developing?
couldn't you have been developing?
couldn't he have been developing?
couldn't we have been developing?
couldn't you have been developing?
couldn't they have been developing?