could umber
Verbe régulier : umber - umbered- umbered

Affirmation 	
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I could umber
you could umber
he could umber
we could umber
you could umber
they could umber 	I could be umbering
you could be umbering
he could be umbering
we could be umbering
you could be umbering
they could be umbering	I could have umbered
you could have umbered
he could have umbered
we could have umbered
you could have umbered
they could have umbered	I could have been umbering
you could have been umbering
he could have been umbering
we could have been umbering
you could have been umbering
they could have been umbering	

Négation 	
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I couldn't umber
you couldn't umber
he couldn't umber
we couldn't umber
you couldn't umber
they couldn't umber 	I couldn't be umbering
you couldn't be umbering
he couldn't be umbering
we couldn't be umbering
you couldn't be umbering
they couldn't be umbering	I couldn't have umbered
you couldn't have umbered
he couldn't have umbered
we couldn't have umbered
you couldn't have umbered
they couldn't have umbered	I couldn't have been umbering
you couldn't have been umbering
he couldn't have been umbering
we couldn't have been umbering
you couldn't have been umbering
they couldn't have been umbering	

Forme interrogative 	
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could I umber?
could you umber?
could he umber?
could we umber?
could you umber?
could they umber? 	could I be umbering?
could you be umbering?
could he be umbering?
could we be umbering?
could you be umbering?
could they be umbering? 	could I have umbered?
could you have umbered?
could he have umbered?
could we have umbered?
could you have umbered?
could they have umbered? 	could I have been umbering?
could you have been umbering?
could he have been umbering?
could we have been umbering?
could you have been umbering?
could they have been umbering? 	

Forme interro-négative 	
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couldn't I umber?
couldn't you umber?
couldn't he umber?
couldn't we umber?
couldn't you umber?
couldn't they umber? 	couldn't I be umbering?
couldn't you be umbering?
couldn't he be umbering?
couldn't we be umbering?
couldn't you be umbering?
couldn't they be umbering? 	couldn't I have umbered?
couldn't you have umbered?
couldn't he have umbered?
couldn't we have umbered?
couldn't you have umbered?
couldn't they have umbered? 	couldn't I have been umbering?
couldn't you have been umbering?
couldn't he have been umbering?
couldn't we have been umbering?
couldn't you have been umbering?
couldn't they have been umbering?