could plan
Verbo regular: plan - planned- planned

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could plan
you could plan
he could plan
we could plan
you could plan
they could plan 	I could be planning
you could be planning
he could be planning
we could be planning
you could be planning
they could be planning	I could have planned
you could have planned
he could have planned
we could have planned
you could have planned
they could have planned	I could have been planning
you could have been planning
he could have been planning
we could have been planning
you could have been planning
they could have been planning	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't plan
you couldn't plan
he couldn't plan
we couldn't plan
you couldn't plan
they couldn't plan 	I couldn't be planning
you couldn't be planning
he couldn't be planning
we couldn't be planning
you couldn't be planning
they couldn't be planning	I couldn't have planned
you couldn't have planned
he couldn't have planned
we couldn't have planned
you couldn't have planned
they couldn't have planned	I couldn't have been planning
you couldn't have been planning
he couldn't have been planning
we couldn't have been planning
you couldn't have been planning
they couldn't have been planning	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I plan?
could you plan?
could he plan?
could we plan?
could you plan?
could they plan? 	could I be planning?
could you be planning?
could he be planning?
could we be planning?
could you be planning?
could they be planning? 	could I have planned?
could you have planned?
could he have planned?
could we have planned?
could you have planned?
could they have planned? 	could I have been planning?
could you have been planning?
could he have been planning?
could we have been planning?
could you have been planning?
could they have been planning? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I plan?
couldn't you plan?
couldn't he plan?
couldn't we plan?
couldn't you plan?
couldn't they plan? 	couldn't I be planning?
couldn't you be planning?
couldn't he be planning?
couldn't we be planning?
couldn't you be planning?
couldn't they be planning? 	couldn't I have planned?
couldn't you have planned?
couldn't he have planned?
couldn't we have planned?
couldn't you have planned?
couldn't they have planned? 	couldn't I have been planning?
couldn't you have been planning?
couldn't he have been planning?
couldn't we have been planning?
couldn't you have been planning?
couldn't they have been planning?