could shortchange
Regular verb: shortchange - shortchanged- shortchanged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could shortchange
you could shortchange
he could shortchange
we could shortchange
you could shortchange
they could shortchange 	I could be shortchanging
you could be shortchanging
he could be shortchanging
we could be shortchanging
you could be shortchanging
they could be shortchanging	I could have shortchanged
you could have shortchanged
he could have shortchanged
we could have shortchanged
you could have shortchanged
they could have shortchanged	I could have been shortchanging
you could have been shortchanging
he could have been shortchanging
we could have been shortchanging
you could have been shortchanging
they could have been shortchanging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't shortchange
you couldn't shortchange
he couldn't shortchange
we couldn't shortchange
you couldn't shortchange
they couldn't shortchange 	I couldn't be shortchanging
you couldn't be shortchanging
he couldn't be shortchanging
we couldn't be shortchanging
you couldn't be shortchanging
they couldn't be shortchanging	I couldn't have shortchanged
you couldn't have shortchanged
he couldn't have shortchanged
we couldn't have shortchanged
you couldn't have shortchanged
they couldn't have shortchanged	I couldn't have been shortchanging
you couldn't have been shortchanging
he couldn't have been shortchanging
we couldn't have been shortchanging
you couldn't have been shortchanging
they couldn't have been shortchanging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I shortchange?
could you shortchange?
could he shortchange?
could we shortchange?
could you shortchange?
could they shortchange? 	could I be shortchanging?
could you be shortchanging?
could he be shortchanging?
could we be shortchanging?
could you be shortchanging?
could they be shortchanging? 	could I have shortchanged?
could you have shortchanged?
could he have shortchanged?
could we have shortchanged?
could you have shortchanged?
could they have shortchanged? 	could I have been shortchanging?
could you have been shortchanging?
could he have been shortchanging?
could we have been shortchanging?
could you have been shortchanging?
could they have been shortchanging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I shortchange?
couldn't you shortchange?
couldn't he shortchange?
couldn't we shortchange?
couldn't you shortchange?
couldn't they shortchange? 	couldn't I be shortchanging?
couldn't you be shortchanging?
couldn't he be shortchanging?
couldn't we be shortchanging?
couldn't you be shortchanging?
couldn't they be shortchanging? 	couldn't I have shortchanged?
couldn't you have shortchanged?
couldn't he have shortchanged?
couldn't we have shortchanged?
couldn't you have shortchanged?
couldn't they have shortchanged? 	couldn't I have been shortchanging?
couldn't you have been shortchanging?
couldn't he have been shortchanging?
couldn't we have been shortchanging?
couldn't you have been shortchanging?
couldn't they have been shortchanging?