could collect
Verbo regular: collect - collected- collected

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could collect
you could collect
he could collect
we could collect
you could collect
they could collect 	I could be collecting
you could be collecting
he could be collecting
we could be collecting
you could be collecting
they could be collecting	I could have collected
you could have collected
he could have collected
we could have collected
you could have collected
they could have collected	I could have been collecting
you could have been collecting
he could have been collecting
we could have been collecting
you could have been collecting
they could have been collecting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't collect
you couldn't collect
he couldn't collect
we couldn't collect
you couldn't collect
they couldn't collect 	I couldn't be collecting
you couldn't be collecting
he couldn't be collecting
we couldn't be collecting
you couldn't be collecting
they couldn't be collecting	I couldn't have collected
you couldn't have collected
he couldn't have collected
we couldn't have collected
you couldn't have collected
they couldn't have collected	I couldn't have been collecting
you couldn't have been collecting
he couldn't have been collecting
we couldn't have been collecting
you couldn't have been collecting
they couldn't have been collecting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I collect?
could you collect?
could he collect?
could we collect?
could you collect?
could they collect? 	could I be collecting?
could you be collecting?
could he be collecting?
could we be collecting?
could you be collecting?
could they be collecting? 	could I have collected?
could you have collected?
could he have collected?
could we have collected?
could you have collected?
could they have collected? 	could I have been collecting?
could you have been collecting?
could he have been collecting?
could we have been collecting?
could you have been collecting?
could they have been collecting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I collect?
couldn't you collect?
couldn't he collect?
couldn't we collect?
couldn't you collect?
couldn't they collect? 	couldn't I be collecting?
couldn't you be collecting?
couldn't he be collecting?
couldn't we be collecting?
couldn't you be collecting?
couldn't they be collecting? 	couldn't I have collected?
couldn't you have collected?
couldn't he have collected?
couldn't we have collected?
couldn't you have collected?
couldn't they have collected? 	couldn't I have been collecting?
couldn't you have been collecting?
couldn't he have been collecting?
couldn't we have been collecting?
couldn't you have been collecting?
couldn't they have been collecting?