ought to gum
Regular verb: gum - gummed- gummed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to gum
you ought to gum
he ought to gum
we ought to gum
you ought to gum
they ought to gum 	I ought to be gumming
you ought to be gumming
he ought to be gumming
we ought to be gumming
you ought to be gumming
they ought to be gumming	I ought to have gummed
you ought to have gummed
he ought to have gummed
we ought to have gummed
you ought to have gummed
they ought to have gummed	I ought to have been gumming
you ought to have been gumming
he ought to have been gumming
we ought to have been gumming
you ought to have been gumming
they ought to have been gumming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to gum
you ought not to gum
he ought not to gum
we ought not to gum
you ought not to gum
they ought not to gum 	I ought not to gumming
you ought not to gumming
he ought not to gumming
we ought not to gumming
you ought not to gumming
they ought not to gumming	I ought not to have gummed
you ought not to have gummed
he ought not to have gummed
we ought not to have gummed
you ought not to have gummed
they ought not to have gummed	I ought not to have been gumming
you ought not to have been gumming
he ought not to have been gumming
we ought not to have been gumming
you ought not to have been gumming
they ought not to have been gumming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I gum?
ought to you gum?
ought to he gum?
ought to we gum?
ought to you gum?
ought to they gum? 	ought to I be gumming?
ought to you be gumming?
ought to he be gumming?
ought to we be gumming?
ought to you be gumming?
ought to they be gumming? 	ought to I have gummed?
ought to you have gummed?
ought to he have gummed?
ought to we have gummed?
ought to you have gummed?
ought to they have gummed? 	ought to I have been gumming?
ought to you have been gumming?
ought to he have been gumming?
ought to we have been gumming?
ought to you have been gumming?
ought to they have been gumming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to gum?
ought you not to gum?
ought he not to gum?
ought we not to gum?
ought you not to gum?
ought they not to gum? 	ought I not to be gumming?
ought you not to be gumming?
ought he not to be gumming?
ought we not to be gumming?
ought you not to be gumming?
ought they not to be gumming? 	ought I not to have gummed?
ought you not to have gummed?
ought he not to have gummed?
ought we not to have gummed?
ought you not to have gummed?
ought they not to have gummed? 	ought I not to have been gumming?
ought you not to have been gumming?
ought he not to have been gumming?
ought we not to have been gumming?
ought you not to have been gumming?
ought they not to have been gumming?