ought to demist
Regular verb: demist - demisted- demisted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to demist
you ought to demist
he ought to demist
we ought to demist
you ought to demist
they ought to demist 	I ought to be demisting
you ought to be demisting
he ought to be demisting
we ought to be demisting
you ought to be demisting
they ought to be demisting	I ought to have demisted
you ought to have demisted
he ought to have demisted
we ought to have demisted
you ought to have demisted
they ought to have demisted	I ought to have been demisting
you ought to have been demisting
he ought to have been demisting
we ought to have been demisting
you ought to have been demisting
they ought to have been demisting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to demist
you oughtn't to demist
he oughtn't to demist
we oughtn't to demist
you oughtn't to demist
they oughtn't to demist 	I oughtn't to be demisting
you oughtn't to be demisting
he oughtn't to be demisting
we oughtn't to be demisting
you oughtn't to be demisting
they oughtn't to be demisting	I oughtn't to have demisted
you oughtn't to have demisted
he oughtn't to have demisted
we oughtn't to have demisted
you oughtn't to have demisted
they oughtn't to have demisted	I oughtn't to have been demisting
you oughtn't to have been demisting
he oughtn't to have been demisting
we oughtn't to have been demisting
you oughtn't to have been demisting
they oughtn't to have been demisting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I demist?
ought to you demist?
ought to he demist?
ought to we demist?
ought to you demist?
ought to they demist? 	ought to I be demisting?
ought to you be demisting?
ought to he be demisting?
ought to we be demisting?
ought to you be demisting?
ought to they be demisting? 	ought to I have demisted?
ought to you have demisted?
ought to he have demisted?
ought to we have demisted?
ought to you have demisted?
ought to they have demisted? 	ought to I have been demisting?
ought to you have been demisting?
ought to he have been demisting?
ought to we have been demisting?
ought to you have been demisting?
ought to they have been demisting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to demist?
oughtn't you to demist?
oughtn't he to demist?
oughtn't we to demist?
oughtn't you to demist?
oughtn't they to demist? 	oughtn't I to be demisting?
oughtn't you to be demisting?
oughtn't he to be demisting?
oughtn't we to be demisting?
oughtn't you to be demisting?
oughtn't they to be demisting? 	oughtn't I to have demisted?
oughtn't you to have demisted?
oughtn't he to have demisted?
oughtn't we to have demisted?
oughtn't you to have demisted?
oughtn't they to have demisted? 	oughtn't I to have been demisting?
oughtn't you to have been demisting?
oughtn't he to have been demisting?
oughtn't we to have been demisting?
oughtn't you to have been demisting?
oughtn't they to have been demisting?