English verb conjugation
CAN CUMBER

Regular verb: cumber - cumbered - cumbered

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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