ought to muffle
Regular verb: muffle - muffled- muffled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to muffle
you ought to muffle
she ought to muffle
we ought to muffle
you ought to muffle
they ought to muffle 	I ought to be muffling
you ought to be muffling
she ought to be muffling
we ought to be muffling
you ought to be muffling
they ought to be muffling	I ought to have muffled
you ought to have muffled
she ought to have muffled
we ought to have muffled
you ought to have muffled
they ought to have muffled	I ought to have been muffling
you ought to have been muffling
she ought to have been muffling
we ought to have been muffling
you ought to have been muffling
they ought to have been muffling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to muffle
you ought not to muffle
she ought not to muffle
we ought not to muffle
you ought not to muffle
they ought not to muffle 	I ought not to muffling
you ought not to muffling
she ought not to muffling
we ought not to muffling
you ought not to muffling
they ought not to muffling	I ought not to have muffled
you ought not to have muffled
she ought not to have muffled
we ought not to have muffled
you ought not to have muffled
they ought not to have muffled	I ought not to have been muffling
you ought not to have been muffling
she ought not to have been muffling
we ought not to have been muffling
you ought not to have been muffling
they ought not to have been muffling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I muffle?
ought to you muffle?
ought to she muffle?
ought to we muffle?
ought to you muffle?
ought to they muffle? 	ought to I be muffling?
ought to you be muffling?
ought to she be muffling?
ought to we be muffling?
ought to you be muffling?
ought to they be muffling? 	ought to I have muffled?
ought to you have muffled?
ought to she have muffled?
ought to we have muffled?
ought to you have muffled?
ought to they have muffled? 	ought to I have been muffling?
ought to you have been muffling?
ought to she have been muffling?
ought to we have been muffling?
ought to you have been muffling?
ought to they have been muffling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to muffle?
ought you not to muffle?
ought she not to muffle?
ought we not to muffle?
ought you not to muffle?
ought they not to muffle? 	ought I not to be muffling?
ought you not to be muffling?
ought she not to be muffling?
ought we not to be muffling?
ought you not to be muffling?
ought they not to be muffling? 	ought I not to have muffled?
ought you not to have muffled?
ought she not to have muffled?
ought we not to have muffled?
ought you not to have muffled?
ought they not to have muffled? 	ought I not to have been muffling?
ought you not to have been muffling?
ought she not to have been muffling?
ought we not to have been muffling?
ought you not to have been muffling?
ought they not to have been muffling?