ought to desulferise
Regular verb: desulferise - desulferised- desulferised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to desulferise
you ought to desulferise
he ought to desulferise
we ought to desulferise
you ought to desulferise
they ought to desulferise 	I ought to be desulferising
you ought to be desulferising
he ought to be desulferising
we ought to be desulferising
you ought to be desulferising
they ought to be desulferising	I ought to have desulferised
you ought to have desulferised
he ought to have desulferised
we ought to have desulferised
you ought to have desulferised
they ought to have desulferised	I ought to have been desulferising
you ought to have been desulferising
he ought to have been desulferising
we ought to have been desulferising
you ought to have been desulferising
they ought to have been desulferising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to desulferise
you oughtn't to desulferise
he oughtn't to desulferise
we oughtn't to desulferise
you oughtn't to desulferise
they oughtn't to desulferise 	I oughtn't to be desulferising
you oughtn't to be desulferising
he oughtn't to be desulferising
we oughtn't to be desulferising
you oughtn't to be desulferising
they oughtn't to be desulferising	I oughtn't to have desulferised
you oughtn't to have desulferised
he oughtn't to have desulferised
we oughtn't to have desulferised
you oughtn't to have desulferised
they oughtn't to have desulferised	I oughtn't to have been desulferising
you oughtn't to have been desulferising
he oughtn't to have been desulferising
we oughtn't to have been desulferising
you oughtn't to have been desulferising
they oughtn't to have been desulferising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I desulferise?
ought to you desulferise?
ought to he desulferise?
ought to we desulferise?
ought to you desulferise?
ought to they desulferise? 	ought to I be desulferising?
ought to you be desulferising?
ought to he be desulferising?
ought to we be desulferising?
ought to you be desulferising?
ought to they be desulferising? 	ought to I have desulferised?
ought to you have desulferised?
ought to he have desulferised?
ought to we have desulferised?
ought to you have desulferised?
ought to they have desulferised? 	ought to I have been desulferising?
ought to you have been desulferising?
ought to he have been desulferising?
ought to we have been desulferising?
ought to you have been desulferising?
ought to they have been desulferising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to desulferise?
oughtn't you to desulferise?
oughtn't he to desulferise?
oughtn't we to desulferise?
oughtn't you to desulferise?
oughtn't they to desulferise? 	oughtn't I to be desulferising?
oughtn't you to be desulferising?
oughtn't he to be desulferising?
oughtn't we to be desulferising?
oughtn't you to be desulferising?
oughtn't they to be desulferising? 	oughtn't I to have desulferised?
oughtn't you to have desulferised?
oughtn't he to have desulferised?
oughtn't we to have desulferised?
oughtn't you to have desulferised?
oughtn't they to have desulferised? 	oughtn't I to have been desulferising?
oughtn't you to have been desulferising?
oughtn't he to have been desulferising?
oughtn't we to have been desulferising?
oughtn't you to have been desulferising?
oughtn't they to have been desulferising?