can dumb
Verbo regolare: dumb - dumbed- dumbed

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I can dumb
you can dumb
he can dumb
we can dumb
you can dumb
they can dumb 	I can be dumbing
you can be dumbing
he can be dumbing
we can be dumbing
you can be dumbing
they can be dumbing	I can have dumbed
you can have dumbed
he can have dumbed
we can have dumbed
you can have dumbed
they can have dumbed	I can have been dumbing
you can have been dumbing
he can have been dumbing
we can have been dumbing
you can have been dumbing
they can have been dumbing	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I cannot dumb
you cannot dumb
he cannot dumb
we cannot dumb
you cannot dumb
they cannot dumb 	I cannot be dumbing
you cannot be dumbing
he cannot be dumbing
we cannot be dumbing
you cannot be dumbing
they cannot be dumbing	I cannot have dumbed
you cannot have dumbed
he cannot have dumbed
we cannot have dumbed
you cannot have dumbed
they cannot have dumbed	I cannot have been dumbing
you cannot have been dumbing
he cannot have been dumbing
we cannot have been dumbing
you cannot have been dumbing
they cannot have been dumbing	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
can I dumb?
can you dumb?
can he dumb?
can we dumb?
can you dumb?
can they dumb? 	can I be dumbing?
can you be dumbing?
can he be dumbing?
can we be dumbing?
can you be dumbing?
can they be dumbing? 	can I have dumbed?
can you have dumbed?
can he have dumbed?
can we have dumbed?
can you have dumbed?
can they have dumbed? 	can I have been dumbing?
can you have been dumbing?
can he have been dumbing?
can we have been dumbing?
can you have been dumbing?
can they have been dumbing? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
can I not dumb?
can you not dumb?
can he not dumb?
can we not dumb?
can you not dumb?
can they not dumb? 	can I not be dumbing?
can you not be dumbing?
can he not be dumbing?
can we not be dumbing?
can you not be dumbing?
can they not be dumbing? 	can I not have dumbed?
can you not have dumbed?
can he not have dumbed?
can we not have dumbed?
can you not have dumbed?
can they not have dumbed? 	can I not have been dumbing?
can you not have been dumbing?
can he not have been dumbing?
can we not have been dumbing?
can you not have been dumbing?
can they not have been dumbing?