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