English verb conjugation
OUGHT TO PREBOARD

Regular verb: preboard - preboarded - preboarded

Affirmation

Simple form	V-ing form
I ought to preboard you ought to preboard he ought to preboard we ought to preboard you ought to preboard they ought to preboard	I ought to be preboarding you ought to be preboarding he ought to be preboarding we ought to be preboarding you ought to be preboarding they ought to be preboarding
Perfect	V-ing perfect
I ought to have preboarded you ought to have preboarded he ought to have preboarded we ought to have preboarded you ought to have preboarded they ought to have preboarded	I ought to have been preboarding you ought to have been preboarding he ought to have been preboarding we ought to have been preboarding you ought to have been preboarding they ought to have been preboarding

Negation

Simple form	V-ing form
I oughtn't to preboard you oughtn't to preboard he oughtn't to preboard we oughtn't to preboard you oughtn't to preboard they oughtn't to preboard	I oughtn't to be preboarding you oughtn't to be preboarding he oughtn't to be preboarding we oughtn't to be preboarding you oughtn't to be preboarding they oughtn't to be preboarding
Perfect	V-ing perfect
I oughtn't to have preboarded you oughtn't to have preboarded he oughtn't to have preboarded we oughtn't to have preboarded you oughtn't to have preboarded they oughtn't to have preboarded	I oughtn't to have been preboarding you oughtn't to have been preboarding he oughtn't to have been preboarding we oughtn't to have been preboarding you oughtn't to have been preboarding they oughtn't to have been preboarding

Interrogative form

Simple form	V-ing form
ought to I preboard? ought to you preboard? ought to he preboard? ought to we preboard? ought to you preboard? ought to they preboard?	ought to I be preboarding? ought to you be preboarding? ought to he be preboarding? ought to we be preboarding? ought to you be preboarding? ought to they be preboarding?
Perfect	V-ing perfect
ought to I have preboarded? ought to you have preboarded? ought to he have preboarded? ought to we have preboarded? ought to you have preboarded? ought to they have preboarded?	ought to I have been preboarding? ought to you have been preboarding? ought to he have been preboarding? ought to we have been preboarding? ought to you have been preboarding? ought to they have been preboarding?

Interro-negative form

Simple form	V-ing form
oughtn't I to preboard? oughtn't you to preboard? oughtn't he to preboard? oughtn't we to preboard? oughtn't you to preboard? oughtn't they to preboard?	oughtn't I to be preboarding? oughtn't you to be preboarding? oughtn't he to be preboarding? oughtn't we to be preboarding? oughtn't you to be preboarding? oughtn't they to be preboarding?
Perfect	V-ing perfect
oughtn't I to have preboarded? oughtn't you to have preboarded? oughtn't he to have preboarded? oughtn't we to have preboarded? oughtn't you to have preboarded? oughtn't they to have preboarded?	oughtn't I to have been preboarding? oughtn't you to have been preboarding? oughtn't he to have been preboarding? oughtn't we to have been preboarding? oughtn't you to have been preboarding? oughtn't they to have been preboarding?