English verb conjugation
COULD CUMBER

Regular verb: cumber - cumbered - cumbered

Affirmation

Simple form	V-ing form
I could cumber you could cumber he could cumber we could cumber you could cumber they could cumber	I could be cumbering you could be cumbering he could be cumbering we could be cumbering you could be cumbering they could be cumbering
Perfect	V-ing perfect
I could have cumbered you could have cumbered he could have cumbered we could have cumbered you could have cumbered they could have cumbered	I could have been cumbering you could have been cumbering he could have been cumbering we could have been cumbering you could have been cumbering they could have been cumbering

Negation

Simple form	V-ing form
I couldn't cumber you couldn't cumber he couldn't cumber we couldn't cumber you couldn't cumber they couldn't cumber	I couldn't be cumbering you couldn't be cumbering he couldn't be cumbering we couldn't be cumbering you couldn't be cumbering they couldn't be cumbering
Perfect	V-ing perfect
I couldn't have cumbered you couldn't have cumbered he couldn't have cumbered we couldn't have cumbered you couldn't have cumbered they couldn't have cumbered	I couldn't have been cumbering you couldn't have been cumbering he couldn't have been cumbering we couldn't have been cumbering you couldn't have been cumbering they couldn't have been cumbering

Interrogative form

Simple form	V-ing form
could I cumber? could you cumber? could he cumber? could we cumber? could you cumber? could they cumber?	could I be cumbering? could you be cumbering? could he be cumbering? could we be cumbering? could you be cumbering? could they be cumbering?
Perfect	V-ing perfect
could I have cumbered? could you have cumbered? could he have cumbered? could we have cumbered? could you have cumbered? could they have cumbered?	could I have been cumbering? could you have been cumbering? could he have been cumbering? could we have been cumbering? could you have been cumbering? could they have been cumbering?

Interro-negative form

Simple form	V-ing form
couldn't I cumber? couldn't you cumber? couldn't he cumber? couldn't we cumber? couldn't you cumber? couldn't they cumber?	couldn't I be cumbering? couldn't you be cumbering? couldn't he be cumbering? couldn't we be cumbering? couldn't you be cumbering? couldn't they be cumbering?
Perfect	V-ing perfect
couldn't I have cumbered? couldn't you have cumbered? couldn't he have cumbered? couldn't we have cumbered? couldn't you have cumbered? couldn't they have cumbered?	couldn't I have been cumbering? couldn't you have been cumbering? couldn't he have been cumbering? couldn't we have been cumbering? couldn't you have been cumbering? couldn't they have been cumbering?