could lightning
Verbo regular: lightning - lightninged- lightninged

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could lightning
you could lightning
he could lightning
we could lightning
you could lightning
they could lightning 	I could be lightninging
you could be lightninging
he could be lightninging
we could be lightninging
you could be lightninging
they could be lightninging	I could have lightninged
you could have lightninged
he could have lightninged
we could have lightninged
you could have lightninged
they could have lightninged	I could have been lightninging
you could have been lightninging
he could have been lightninging
we could have been lightninging
you could have been lightninging
they could have been lightninging	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't lightning
you couldn't lightning
he couldn't lightning
we couldn't lightning
you couldn't lightning
they couldn't lightning 	I couldn't be lightninging
you couldn't be lightninging
he couldn't be lightninging
we couldn't be lightninging
you couldn't be lightninging
they couldn't be lightninging	I couldn't have lightninged
you couldn't have lightninged
he couldn't have lightninged
we couldn't have lightninged
you couldn't have lightninged
they couldn't have lightninged	I couldn't have been lightninging
you couldn't have been lightninging
he couldn't have been lightninging
we couldn't have been lightninging
you couldn't have been lightninging
they couldn't have been lightninging	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I lightning?
could you lightning?
could he lightning?
could we lightning?
could you lightning?
could they lightning? 	could I be lightninging?
could you be lightninging?
could he be lightninging?
could we be lightninging?
could you be lightninging?
could they be lightninging? 	could I have lightninged?
could you have lightninged?
could he have lightninged?
could we have lightninged?
could you have lightninged?
could they have lightninged? 	could I have been lightninging?
could you have been lightninging?
could he have been lightninging?
could we have been lightninging?
could you have been lightninging?
could they have been lightninging? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I lightning?
couldn't you lightning?
couldn't he lightning?
couldn't we lightning?
couldn't you lightning?
couldn't they lightning? 	couldn't I be lightninging?
couldn't you be lightninging?
couldn't he be lightninging?
couldn't we be lightninging?
couldn't you be lightninging?
couldn't they be lightninging? 	couldn't I have lightninged?
couldn't you have lightninged?
couldn't he have lightninged?
couldn't we have lightninged?
couldn't you have lightninged?
couldn't they have lightninged? 	couldn't I have been lightninging?
couldn't you have been lightninging?
couldn't he have been lightninging?
couldn't we have been lightninging?
couldn't you have been lightninging?
couldn't they have been lightninging?