can umber
Verbe régulier : umber - umbered- umbered

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I can umber
you can umber
she can umber
we can umber
you can umber
they can umber 	I can be umbering
you can be umbering
she can be umbering
we can be umbering
you can be umbering
they can be umbering	I can have umbered
you can have umbered
she can have umbered
we can have umbered
you can have umbered
they can have umbered	I can have been umbering
you can have been umbering
she can have been umbering
we can have been umbering
you can have been umbering
they can have been umbering	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I cannot umber
you cannot umber
she cannot umber
we cannot umber
you cannot umber
they cannot umber 	I cannot be umbering
you cannot be umbering
she cannot be umbering
we cannot be umbering
you cannot be umbering
they cannot be umbering	I cannot have umbered
you cannot have umbered
she cannot have umbered
we cannot have umbered
you cannot have umbered
they cannot have umbered	I cannot have been umbering
you cannot have been umbering
she cannot have been umbering
we cannot have been umbering
you cannot have been umbering
they cannot have been umbering	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
can I umber?
can you umber?
can she umber?
can we umber?
can you umber?
can they umber? 	can I be umbering?
can you be umbering?
can she be umbering?
can we be umbering?
can you be umbering?
can they be umbering? 	can I have umbered?
can you have umbered?
can she have umbered?
can we have umbered?
can you have umbered?
can they have umbered? 	can I have been umbering?
can you have been umbering?
can she have been umbering?
can we have been umbering?
can you have been umbering?
can they have been umbering? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
can I not umber?
can you not umber?
can she not umber?
can we not umber?
can you not umber?
can they not umber? 	can I not be umbering?
can you not be umbering?
can she not be umbering?
can we not be umbering?
can you not be umbering?
can they not be umbering? 	can I not have umbered?
can you not have umbered?
can she not have umbered?
can we not have umbered?
can you not have umbered?
can they not have umbered? 	can I not have been umbering?
can you not have been umbering?
can she not have been umbering?
can we not have been umbering?
can you not have been umbering?
can they not have been umbering?