ought to ferment
Regular verb: ferment - fermented- fermented

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to ferment
you ought to ferment
she ought to ferment
we ought to ferment
you ought to ferment
they ought to ferment 	I ought to be fermenting
you ought to be fermenting
she ought to be fermenting
we ought to be fermenting
you ought to be fermenting
they ought to be fermenting	I ought to have fermented
you ought to have fermented
she ought to have fermented
we ought to have fermented
you ought to have fermented
they ought to have fermented	I ought to have been fermenting
you ought to have been fermenting
she ought to have been fermenting
we ought to have been fermenting
you ought to have been fermenting
they ought to have been fermenting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to ferment
you ought not to ferment
she ought not to ferment
we ought not to ferment
you ought not to ferment
they ought not to ferment 	I ought not to fermenting
you ought not to fermenting
she ought not to fermenting
we ought not to fermenting
you ought not to fermenting
they ought not to fermenting	I ought not to have fermented
you ought not to have fermented
she ought not to have fermented
we ought not to have fermented
you ought not to have fermented
they ought not to have fermented	I ought not to have been fermenting
you ought not to have been fermenting
she ought not to have been fermenting
we ought not to have been fermenting
you ought not to have been fermenting
they ought not to have been fermenting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I ferment?
ought to you ferment?
ought to she ferment?
ought to we ferment?
ought to you ferment?
ought to they ferment? 	ought to I be fermenting?
ought to you be fermenting?
ought to she be fermenting?
ought to we be fermenting?
ought to you be fermenting?
ought to they be fermenting? 	ought to I have fermented?
ought to you have fermented?
ought to she have fermented?
ought to we have fermented?
ought to you have fermented?
ought to they have fermented? 	ought to I have been fermenting?
ought to you have been fermenting?
ought to she have been fermenting?
ought to we have been fermenting?
ought to you have been fermenting?
ought to they have been fermenting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to ferment?
ought you not to ferment?
ought she not to ferment?
ought we not to ferment?
ought you not to ferment?
ought they not to ferment? 	ought I not to be fermenting?
ought you not to be fermenting?
ought she not to be fermenting?
ought we not to be fermenting?
ought you not to be fermenting?
ought they not to be fermenting? 	ought I not to have fermented?
ought you not to have fermented?
ought she not to have fermented?
ought we not to have fermented?
ought you not to have fermented?
ought they not to have fermented? 	ought I not to have been fermenting?
ought you not to have been fermenting?
ought she not to have been fermenting?
ought we not to have been fermenting?
ought you not to have been fermenting?
ought they not to have been fermenting?