could troop
Regular verb: troop - trooped- trooped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could troop
you could troop
he could troop
we could troop
you could troop
they could troop 	I could be trooping
you could be trooping
he could be trooping
we could be trooping
you could be trooping
they could be trooping	I could have trooped
you could have trooped
he could have trooped
we could have trooped
you could have trooped
they could have trooped	I could have been trooping
you could have been trooping
he could have been trooping
we could have been trooping
you could have been trooping
they could have been trooping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't troop
you couldn't troop
he couldn't troop
we couldn't troop
you couldn't troop
they couldn't troop 	I couldn't be trooping
you couldn't be trooping
he couldn't be trooping
we couldn't be trooping
you couldn't be trooping
they couldn't be trooping	I couldn't have trooped
you couldn't have trooped
he couldn't have trooped
we couldn't have trooped
you couldn't have trooped
they couldn't have trooped	I couldn't have been trooping
you couldn't have been trooping
he couldn't have been trooping
we couldn't have been trooping
you couldn't have been trooping
they couldn't have been trooping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I troop?
could you troop?
could he troop?
could we troop?
could you troop?
could they troop? 	could I be trooping?
could you be trooping?
could he be trooping?
could we be trooping?
could you be trooping?
could they be trooping? 	could I have trooped?
could you have trooped?
could he have trooped?
could we have trooped?
could you have trooped?
could they have trooped? 	could I have been trooping?
could you have been trooping?
could he have been trooping?
could we have been trooping?
could you have been trooping?
could they have been trooping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I troop?
couldn't you troop?
couldn't he troop?
couldn't we troop?
couldn't you troop?
couldn't they troop? 	couldn't I be trooping?
couldn't you be trooping?
couldn't he be trooping?
couldn't we be trooping?
couldn't you be trooping?
couldn't they be trooping? 	couldn't I have trooped?
couldn't you have trooped?
couldn't he have trooped?
couldn't we have trooped?
couldn't you have trooped?
couldn't they have trooped? 	couldn't I have been trooping?
couldn't you have been trooping?
couldn't he have been trooping?
couldn't we have been trooping?
couldn't you have been trooping?
couldn't they have been trooping?