ought to prewash
Regular verb: prewash - prewashed- prewashed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to prewash
you ought to prewash
she ought to prewash
we ought to prewash
you ought to prewash
they ought to prewash 	I ought to be prewashing
you ought to be prewashing
she ought to be prewashing
we ought to be prewashing
you ought to be prewashing
they ought to be prewashing	I ought to have prewashed
you ought to have prewashed
she ought to have prewashed
we ought to have prewashed
you ought to have prewashed
they ought to have prewashed	I ought to have been prewashing
you ought to have been prewashing
she ought to have been prewashing
we ought to have been prewashing
you ought to have been prewashing
they ought to have been prewashing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to prewash
you oughtn't to prewash
she oughtn't to prewash
we oughtn't to prewash
you oughtn't to prewash
they oughtn't to prewash 	I oughtn't to be prewashing
you oughtn't to be prewashing
she oughtn't to be prewashing
we oughtn't to be prewashing
you oughtn't to be prewashing
they oughtn't to be prewashing	I oughtn't to have prewashed
you oughtn't to have prewashed
she oughtn't to have prewashed
we oughtn't to have prewashed
you oughtn't to have prewashed
they oughtn't to have prewashed	I oughtn't to have been prewashing
you oughtn't to have been prewashing
she oughtn't to have been prewashing
we oughtn't to have been prewashing
you oughtn't to have been prewashing
they oughtn't to have been prewashing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I prewash?
ought to you prewash?
ought to she prewash?
ought to we prewash?
ought to you prewash?
ought to they prewash? 	ought to I be prewashing?
ought to you be prewashing?
ought to she be prewashing?
ought to we be prewashing?
ought to you be prewashing?
ought to they be prewashing? 	ought to I have prewashed?
ought to you have prewashed?
ought to she have prewashed?
ought to we have prewashed?
ought to you have prewashed?
ought to they have prewashed? 	ought to I have been prewashing?
ought to you have been prewashing?
ought to she have been prewashing?
ought to we have been prewashing?
ought to you have been prewashing?
ought to they have been prewashing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to prewash?
oughtn't you to prewash?
oughtn't she to prewash?
oughtn't we to prewash?
oughtn't you to prewash?
oughtn't they to prewash? 	oughtn't I to be prewashing?
oughtn't you to be prewashing?
oughtn't she to be prewashing?
oughtn't we to be prewashing?
oughtn't you to be prewashing?
oughtn't they to be prewashing? 	oughtn't I to have prewashed?
oughtn't you to have prewashed?
oughtn't she to have prewashed?
oughtn't we to have prewashed?
oughtn't you to have prewashed?
oughtn't they to have prewashed? 	oughtn't I to have been prewashing?
oughtn't you to have been prewashing?
oughtn't she to have been prewashing?
oughtn't we to have been prewashing?
oughtn't you to have been prewashing?
oughtn't they to have been prewashing?