could smart
Verbo regular: smart - smarted- smarted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could smart
you could smart
he could smart
we could smart
you could smart
they could smart 	I could be smarting
you could be smarting
he could be smarting
we could be smarting
you could be smarting
they could be smarting	I could have smarted
you could have smarted
he could have smarted
we could have smarted
you could have smarted
they could have smarted	I could have been smarting
you could have been smarting
he could have been smarting
we could have been smarting
you could have been smarting
they could have been smarting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't smart
you couldn't smart
he couldn't smart
we couldn't smart
you couldn't smart
they couldn't smart 	I couldn't be smarting
you couldn't be smarting
he couldn't be smarting
we couldn't be smarting
you couldn't be smarting
they couldn't be smarting	I couldn't have smarted
you couldn't have smarted
he couldn't have smarted
we couldn't have smarted
you couldn't have smarted
they couldn't have smarted	I couldn't have been smarting
you couldn't have been smarting
he couldn't have been smarting
we couldn't have been smarting
you couldn't have been smarting
they couldn't have been smarting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I smart?
could you smart?
could he smart?
could we smart?
could you smart?
could they smart? 	could I be smarting?
could you be smarting?
could he be smarting?
could we be smarting?
could you be smarting?
could they be smarting? 	could I have smarted?
could you have smarted?
could he have smarted?
could we have smarted?
could you have smarted?
could they have smarted? 	could I have been smarting?
could you have been smarting?
could he have been smarting?
could we have been smarting?
could you have been smarting?
could they have been smarting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I smart?
couldn't you smart?
couldn't he smart?
couldn't we smart?
couldn't you smart?
couldn't they smart? 	couldn't I be smarting?
couldn't you be smarting?
couldn't he be smarting?
couldn't we be smarting?
couldn't you be smarting?
couldn't they be smarting? 	couldn't I have smarted?
couldn't you have smarted?
couldn't he have smarted?
couldn't we have smarted?
couldn't you have smarted?
couldn't they have smarted? 	couldn't I have been smarting?
couldn't you have been smarting?
couldn't he have been smarting?
couldn't we have been smarting?
couldn't you have been smarting?
couldn't they have been smarting?