could bugle
Regular verb: bugle - bugled- bugled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could bugle
you could bugle
he could bugle
we could bugle
you could bugle
they could bugle 	I could be bugling
you could be bugling
he could be bugling
we could be bugling
you could be bugling
they could be bugling	I could have bugled
you could have bugled
he could have bugled
we could have bugled
you could have bugled
they could have bugled	I could have been bugling
you could have been bugling
he could have been bugling
we could have been bugling
you could have been bugling
they could have been bugling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't bugle
you couldn't bugle
he couldn't bugle
we couldn't bugle
you couldn't bugle
they couldn't bugle 	I couldn't be bugling
you couldn't be bugling
he couldn't be bugling
we couldn't be bugling
you couldn't be bugling
they couldn't be bugling	I couldn't have bugled
you couldn't have bugled
he couldn't have bugled
we couldn't have bugled
you couldn't have bugled
they couldn't have bugled	I couldn't have been bugling
you couldn't have been bugling
he couldn't have been bugling
we couldn't have been bugling
you couldn't have been bugling
they couldn't have been bugling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I bugle?
could you bugle?
could he bugle?
could we bugle?
could you bugle?
could they bugle? 	could I be bugling?
could you be bugling?
could he be bugling?
could we be bugling?
could you be bugling?
could they be bugling? 	could I have bugled?
could you have bugled?
could he have bugled?
could we have bugled?
could you have bugled?
could they have bugled? 	could I have been bugling?
could you have been bugling?
could he have been bugling?
could we have been bugling?
could you have been bugling?
could they have been bugling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I bugle?
couldn't you bugle?
couldn't he bugle?
couldn't we bugle?
couldn't you bugle?
couldn't they bugle? 	couldn't I be bugling?
couldn't you be bugling?
couldn't he be bugling?
couldn't we be bugling?
couldn't you be bugling?
couldn't they be bugling? 	couldn't I have bugled?
couldn't you have bugled?
couldn't he have bugled?
couldn't we have bugled?
couldn't you have bugled?
couldn't they have bugled? 	couldn't I have been bugling?
couldn't you have been bugling?
couldn't he have been bugling?
couldn't we have been bugling?
couldn't you have been bugling?
couldn't they have been bugling?