could track
Verbo regular: track - tracked- tracked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could track
you could track
he could track
we could track
you could track
they could track 	I could be tracking
you could be tracking
he could be tracking
we could be tracking
you could be tracking
they could be tracking	I could have tracked
you could have tracked
he could have tracked
we could have tracked
you could have tracked
they could have tracked	I could have been tracking
you could have been tracking
he could have been tracking
we could have been tracking
you could have been tracking
they could have been tracking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't track
you couldn't track
he couldn't track
we couldn't track
you couldn't track
they couldn't track 	I couldn't be tracking
you couldn't be tracking
he couldn't be tracking
we couldn't be tracking
you couldn't be tracking
they couldn't be tracking	I couldn't have tracked
you couldn't have tracked
he couldn't have tracked
we couldn't have tracked
you couldn't have tracked
they couldn't have tracked	I couldn't have been tracking
you couldn't have been tracking
he couldn't have been tracking
we couldn't have been tracking
you couldn't have been tracking
they couldn't have been tracking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I track?
could you track?
could he track?
could we track?
could you track?
could they track? 	could I be tracking?
could you be tracking?
could he be tracking?
could we be tracking?
could you be tracking?
could they be tracking? 	could I have tracked?
could you have tracked?
could he have tracked?
could we have tracked?
could you have tracked?
could they have tracked? 	could I have been tracking?
could you have been tracking?
could he have been tracking?
could we have been tracking?
could you have been tracking?
could they have been tracking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I track?
couldn't you track?
couldn't he track?
couldn't we track?
couldn't you track?
couldn't they track? 	couldn't I be tracking?
couldn't you be tracking?
couldn't he be tracking?
couldn't we be tracking?
couldn't you be tracking?
couldn't they be tracking? 	couldn't I have tracked?
couldn't you have tracked?
couldn't he have tracked?
couldn't we have tracked?
couldn't you have tracked?
couldn't they have tracked? 	couldn't I have been tracking?
couldn't you have been tracking?
couldn't he have been tracking?
couldn't we have been tracking?
couldn't you have been tracking?
couldn't they have been tracking?