must dumb
Verbo regolare: dumb - dumbed- dumbed

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

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

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

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