could fool
Verbo regular: fool - fooled- fooled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could fool
you could fool
he could fool
we could fool
you could fool
they could fool 	I could be fooling
you could be fooling
he could be fooling
we could be fooling
you could be fooling
they could be fooling	I could have fooled
you could have fooled
he could have fooled
we could have fooled
you could have fooled
they could have fooled	I could have been fooling
you could have been fooling
he could have been fooling
we could have been fooling
you could have been fooling
they could have been fooling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't fool
you couldn't fool
he couldn't fool
we couldn't fool
you couldn't fool
they couldn't fool 	I couldn't be fooling
you couldn't be fooling
he couldn't be fooling
we couldn't be fooling
you couldn't be fooling
they couldn't be fooling	I couldn't have fooled
you couldn't have fooled
he couldn't have fooled
we couldn't have fooled
you couldn't have fooled
they couldn't have fooled	I couldn't have been fooling
you couldn't have been fooling
he couldn't have been fooling
we couldn't have been fooling
you couldn't have been fooling
they couldn't have been fooling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I fool?
could you fool?
could he fool?
could we fool?
could you fool?
could they fool? 	could I be fooling?
could you be fooling?
could he be fooling?
could we be fooling?
could you be fooling?
could they be fooling? 	could I have fooled?
could you have fooled?
could he have fooled?
could we have fooled?
could you have fooled?
could they have fooled? 	could I have been fooling?
could you have been fooling?
could he have been fooling?
could we have been fooling?
could you have been fooling?
could they have been fooling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I fool?
couldn't you fool?
couldn't he fool?
couldn't we fool?
couldn't you fool?
couldn't they fool? 	couldn't I be fooling?
couldn't you be fooling?
couldn't he be fooling?
couldn't we be fooling?
couldn't you be fooling?
couldn't they be fooling? 	couldn't I have fooled?
couldn't you have fooled?
couldn't he have fooled?
couldn't we have fooled?
couldn't you have fooled?
couldn't they have fooled? 	couldn't I have been fooling?
couldn't you have been fooling?
couldn't he have been fooling?
couldn't we have been fooling?
couldn't you have been fooling?
couldn't they have been fooling?