could spot
Verbo regular: spot - spotted- spotted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could spot
you could spot
he could spot
we could spot
you could spot
they could spot 	I could be spotting
you could be spotting
he could be spotting
we could be spotting
you could be spotting
they could be spotting	I could have spotted
you could have spotted
he could have spotted
we could have spotted
you could have spotted
they could have spotted	I could have been spotting
you could have been spotting
he could have been spotting
we could have been spotting
you could have been spotting
they could have been spotting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't spot
you couldn't spot
he couldn't spot
we couldn't spot
you couldn't spot
they couldn't spot 	I couldn't be spotting
you couldn't be spotting
he couldn't be spotting
we couldn't be spotting
you couldn't be spotting
they couldn't be spotting	I couldn't have spotted
you couldn't have spotted
he couldn't have spotted
we couldn't have spotted
you couldn't have spotted
they couldn't have spotted	I couldn't have been spotting
you couldn't have been spotting
he couldn't have been spotting
we couldn't have been spotting
you couldn't have been spotting
they couldn't have been spotting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I spot?
could you spot?
could he spot?
could we spot?
could you spot?
could they spot? 	could I be spotting?
could you be spotting?
could he be spotting?
could we be spotting?
could you be spotting?
could they be spotting? 	could I have spotted?
could you have spotted?
could he have spotted?
could we have spotted?
could you have spotted?
could they have spotted? 	could I have been spotting?
could you have been spotting?
could he have been spotting?
could we have been spotting?
could you have been spotting?
could they have been spotting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I spot?
couldn't you spot?
couldn't he spot?
couldn't we spot?
couldn't you spot?
couldn't they spot? 	couldn't I be spotting?
couldn't you be spotting?
couldn't he be spotting?
couldn't we be spotting?
couldn't you be spotting?
couldn't they be spotting? 	couldn't I have spotted?
couldn't you have spotted?
couldn't he have spotted?
couldn't we have spotted?
couldn't you have spotted?
couldn't they have spotted? 	couldn't I have been spotting?
couldn't you have been spotting?
couldn't he have been spotting?
couldn't we have been spotting?
couldn't you have been spotting?
couldn't they have been spotting?