could unburden
Regular verb: unburden - unburdened- unburdened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could unburden
you could unburden
he could unburden
we could unburden
you could unburden
they could unburden 	I could be unburdening
you could be unburdening
he could be unburdening
we could be unburdening
you could be unburdening
they could be unburdening	I could have unburdened
you could have unburdened
he could have unburdened
we could have unburdened
you could have unburdened
they could have unburdened	I could have been unburdening
you could have been unburdening
he could have been unburdening
we could have been unburdening
you could have been unburdening
they could have been unburdening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't unburden
you couldn't unburden
he couldn't unburden
we couldn't unburden
you couldn't unburden
they couldn't unburden 	I couldn't be unburdening
you couldn't be unburdening
he couldn't be unburdening
we couldn't be unburdening
you couldn't be unburdening
they couldn't be unburdening	I couldn't have unburdened
you couldn't have unburdened
he couldn't have unburdened
we couldn't have unburdened
you couldn't have unburdened
they couldn't have unburdened	I couldn't have been unburdening
you couldn't have been unburdening
he couldn't have been unburdening
we couldn't have been unburdening
you couldn't have been unburdening
they couldn't have been unburdening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I unburden?
could you unburden?
could he unburden?
could we unburden?
could you unburden?
could they unburden? 	could I be unburdening?
could you be unburdening?
could he be unburdening?
could we be unburdening?
could you be unburdening?
could they be unburdening? 	could I have unburdened?
could you have unburdened?
could he have unburdened?
could we have unburdened?
could you have unburdened?
could they have unburdened? 	could I have been unburdening?
could you have been unburdening?
could he have been unburdening?
could we have been unburdening?
could you have been unburdening?
could they have been unburdening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I unburden?
couldn't you unburden?
couldn't he unburden?
couldn't we unburden?
couldn't you unburden?
couldn't they unburden? 	couldn't I be unburdening?
couldn't you be unburdening?
couldn't he be unburdening?
couldn't we be unburdening?
couldn't you be unburdening?
couldn't they be unburdening? 	couldn't I have unburdened?
couldn't you have unburdened?
couldn't he have unburdened?
couldn't we have unburdened?
couldn't you have unburdened?
couldn't they have unburdened? 	couldn't I have been unburdening?
couldn't you have been unburdening?
couldn't he have been unburdening?
couldn't we have been unburdening?
couldn't you have been unburdening?
couldn't they have been unburdening?