ought to prewarm
Regular verb: prewarm - prewarmed- prewarmed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to prewarm
you ought to prewarm
he ought to prewarm
we ought to prewarm
you ought to prewarm
they ought to prewarm 	I ought to be prewarming
you ought to be prewarming
he ought to be prewarming
we ought to be prewarming
you ought to be prewarming
they ought to be prewarming	I ought to have prewarmed
you ought to have prewarmed
he ought to have prewarmed
we ought to have prewarmed
you ought to have prewarmed
they ought to have prewarmed	I ought to have been prewarming
you ought to have been prewarming
he ought to have been prewarming
we ought to have been prewarming
you ought to have been prewarming
they ought to have been prewarming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to prewarm
you oughtn't to prewarm
he oughtn't to prewarm
we oughtn't to prewarm
you oughtn't to prewarm
they oughtn't to prewarm 	I oughtn't to be prewarming
you oughtn't to be prewarming
he oughtn't to be prewarming
we oughtn't to be prewarming
you oughtn't to be prewarming
they oughtn't to be prewarming	I oughtn't to have prewarmed
you oughtn't to have prewarmed
he oughtn't to have prewarmed
we oughtn't to have prewarmed
you oughtn't to have prewarmed
they oughtn't to have prewarmed	I oughtn't to have been prewarming
you oughtn't to have been prewarming
he oughtn't to have been prewarming
we oughtn't to have been prewarming
you oughtn't to have been prewarming
they oughtn't to have been prewarming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I prewarm?
ought to you prewarm?
ought to he prewarm?
ought to we prewarm?
ought to you prewarm?
ought to they prewarm? 	ought to I be prewarming?
ought to you be prewarming?
ought to he be prewarming?
ought to we be prewarming?
ought to you be prewarming?
ought to they be prewarming? 	ought to I have prewarmed?
ought to you have prewarmed?
ought to he have prewarmed?
ought to we have prewarmed?
ought to you have prewarmed?
ought to they have prewarmed? 	ought to I have been prewarming?
ought to you have been prewarming?
ought to he have been prewarming?
ought to we have been prewarming?
ought to you have been prewarming?
ought to they have been prewarming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to prewarm?
oughtn't you to prewarm?
oughtn't he to prewarm?
oughtn't we to prewarm?
oughtn't you to prewarm?
oughtn't they to prewarm? 	oughtn't I to be prewarming?
oughtn't you to be prewarming?
oughtn't he to be prewarming?
oughtn't we to be prewarming?
oughtn't you to be prewarming?
oughtn't they to be prewarming? 	oughtn't I to have prewarmed?
oughtn't you to have prewarmed?
oughtn't he to have prewarmed?
oughtn't we to have prewarmed?
oughtn't you to have prewarmed?
oughtn't they to have prewarmed? 	oughtn't I to have been prewarming?
oughtn't you to have been prewarming?
oughtn't he to have been prewarming?
oughtn't we to have been prewarming?
oughtn't you to have been prewarming?
oughtn't they to have been prewarming?