can umber
Verbo regular: umber - umbered- umbered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can umber
you can umber
he can umber
we can umber
you can umber
they can umber 	I can be umbering
you can be umbering
he can be umbering
we can be umbering
you can be umbering
they can be umbering	I can have umbered
you can have umbered
he 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
he can have been umbering
we can have been umbering
you can have been umbering
they can have been umbering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot umber
you cannot umber
he cannot umber
we cannot umber
you cannot umber
they cannot umber 	I cannot be umbering
you cannot be umbering
he cannot be umbering
we cannot be umbering
you cannot be umbering
they cannot be umbering	I cannot have umbered
you cannot have umbered
he 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
he cannot have been umbering
we cannot have been umbering
you cannot have been umbering
they cannot have been umbering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I umber?
can you umber?
can he umber?
can we umber?
can you umber?
can they umber? 	can I be umbering?
can you be umbering?
can he be umbering?
can we be umbering?
can you be umbering?
can they be umbering? 	can I have umbered?
can you have umbered?
can he 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 he have been umbering?
can we have been umbering?
can you have been umbering?
can they have been umbering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not umber?
can you not umber?
can he 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 he 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 he 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 he not have been umbering?
can we not have been umbering?
can you not have been umbering?
can they not have been umbering?