could collude
Verbo regular: collude - colluded- colluded

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could collude
you could collude
he could collude
we could collude
you could collude
they could collude 	I could be colluding
you could be colluding
he could be colluding
we could be colluding
you could be colluding
they could be colluding	I could have colluded
you could have colluded
he could have colluded
we could have colluded
you could have colluded
they could have colluded	I could have been colluding
you could have been colluding
he could have been colluding
we could have been colluding
you could have been colluding
they could have been colluding	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't collude
you couldn't collude
he couldn't collude
we couldn't collude
you couldn't collude
they couldn't collude 	I couldn't be colluding
you couldn't be colluding
he couldn't be colluding
we couldn't be colluding
you couldn't be colluding
they couldn't be colluding	I couldn't have colluded
you couldn't have colluded
he couldn't have colluded
we couldn't have colluded
you couldn't have colluded
they couldn't have colluded	I couldn't have been colluding
you couldn't have been colluding
he couldn't have been colluding
we couldn't have been colluding
you couldn't have been colluding
they couldn't have been colluding	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I collude?
could you collude?
could he collude?
could we collude?
could you collude?
could they collude? 	could I be colluding?
could you be colluding?
could he be colluding?
could we be colluding?
could you be colluding?
could they be colluding? 	could I have colluded?
could you have colluded?
could he have colluded?
could we have colluded?
could you have colluded?
could they have colluded? 	could I have been colluding?
could you have been colluding?
could he have been colluding?
could we have been colluding?
could you have been colluding?
could they have been colluding? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I collude?
couldn't you collude?
couldn't he collude?
couldn't we collude?
couldn't you collude?
couldn't they collude? 	couldn't I be colluding?
couldn't you be colluding?
couldn't he be colluding?
couldn't we be colluding?
couldn't you be colluding?
couldn't they be colluding? 	couldn't I have colluded?
couldn't you have colluded?
couldn't he have colluded?
couldn't we have colluded?
couldn't you have colluded?
couldn't they have colluded? 	couldn't I have been colluding?
couldn't you have been colluding?
couldn't he have been colluding?
couldn't we have been colluding?
couldn't you have been colluding?
couldn't they have been colluding?