could cumber
Regular verb: cumber - cumbered- cumbered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?