shall dumb
Regular verb: dumb - dumbed- dumbed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'll dumb
you'll dumb
she'll dumb
we'll dumb
you'll dumb
they'll dumb 	I'll be dumbing
you'll be dumbing
she'll be dumbing
we'll be dumbing
you'll be dumbing
they'll be dumbing	I'll have dumbed
you'll have dumbed
she'll have dumbed
we'll have dumbed
you'll have dumbed
they'll have dumbed	I'll have been dumbing
you'll have been dumbing
she'll have been dumbing
we'll have been dumbing
you'll have been dumbing
they'll have been dumbing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shan't dumb
you shan't dumb
she shan't dumb
we shan't dumb
you shan't dumb
they shan't dumb 	I shan't be dumbing
you shan't be dumbing
she shan't be dumbing
we shan't be dumbing
you shan't be dumbing
they shan't be dumbing	I shan't have dumbed
you shan't have dumbed
she shan't have dumbed
we shan't have dumbed
you shan't have dumbed
they shan't have dumbed	I shan't have been dumbing
you shan't have been dumbing
she shan't have been dumbing
we shan't have been dumbing
you shan't have been dumbing
they shan't have been dumbing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I dumb?
shall you dumb?
shall she dumb?
shall we dumb?
shall you dumb?
shall they dumb? 	shall I be dumbing?
shall you be dumbing?
shall she be dumbing?
shall we be dumbing?
shall you be dumbing?
shall they be dumbing? 	shall I have dumbed?
shall you have dumbed?
shall she have dumbed?
shall we have dumbed?
shall you have dumbed?
shall they have dumbed? 	shall I have been dumbing?
shall you have been dumbing?
shall she have been dumbing?
shall we have been dumbing?
shall you have been dumbing?
shall they have been dumbing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shan't I dumb?
shan't you dumb?
shan't she dumb?
shan't we dumb?
shan't you dumb?
shan't they dumb? 	shan't I be dumbing?
shan't you be dumbing?
shan't she be dumbing?
shan't we be dumbing?
shan't you be dumbing?
shan't they be dumbing? 	shan't I have dumbed?
shan't you have dumbed?
shan't she have dumbed?
shan't we have dumbed?
shan't you have dumbed?
shan't they have dumbed? 	shan't I have been dumbing?
shan't you have been dumbing?
shan't she have been dumbing?
shan't we have been dumbing?
shan't you have been dumbing?
shan't they have been dumbing?