shall undersell
Irregular verb: undersell - undersold- undersold

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'll undersell
you'll undersell
she'll undersell
we'll undersell
you'll undersell
they'll undersell 	I'll be underselling
you'll be underselling
she'll be underselling
we'll be underselling
you'll be underselling
they'll be underselling	I'll have undersold
you'll have undersold
she'll have undersold
we'll have undersold
you'll have undersold
they'll have undersold	I'll have been underselling
you'll have been underselling
she'll have been underselling
we'll have been underselling
you'll have been underselling
they'll have been underselling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shan't undersell
you shan't undersell
she shan't undersell
we shan't undersell
you shan't undersell
they shan't undersell 	I shan't be underselling
you shan't be underselling
she shan't be underselling
we shan't be underselling
you shan't be underselling
they shan't be underselling	I shan't have undersold
you shan't have undersold
she shan't have undersold
we shan't have undersold
you shan't have undersold
they shan't have undersold	I shan't have been underselling
you shan't have been underselling
she shan't have been underselling
we shan't have been underselling
you shan't have been underselling
they shan't have been underselling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I undersell?
shall you undersell?
shall she undersell?
shall we undersell?
shall you undersell?
shall they undersell? 	shall I be underselling?
shall you be underselling?
shall she be underselling?
shall we be underselling?
shall you be underselling?
shall they be underselling? 	shall I have undersold?
shall you have undersold?
shall she have undersold?
shall we have undersold?
shall you have undersold?
shall they have undersold? 	shall I have been underselling?
shall you have been underselling?
shall she have been underselling?
shall we have been underselling?
shall you have been underselling?
shall they have been underselling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shan't I undersell?
shan't you undersell?
shan't she undersell?
shan't we undersell?
shan't you undersell?
shan't they undersell? 	shan't I be underselling?
shan't you be underselling?
shan't she be underselling?
shan't we be underselling?
shan't you be underselling?
shan't they be underselling? 	shan't I have undersold?
shan't you have undersold?
shan't she have undersold?
shan't we have undersold?
shan't you have undersold?
shan't they have undersold? 	shan't I have been underselling?
shan't you have been underselling?
shan't she have been underselling?
shan't we have been underselling?
shan't you have been underselling?
shan't they have been underselling?