can undersell
Irregular verb: undersell - undersold- undersold

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

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

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

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