English verb conjugation
SHOULD PREBOARD

Regular verb: preboard - preboarded - preboarded

Affirmation

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

Negation

Simple form	V-ing form
I should not preboard you should not preboard he should not preboard we should not preboard you should not preboard they should not preboard	I should not be preboarding you should not be preboarding he should not be preboarding we should not be preboarding you should not be preboarding they should not be preboarding
Perfect	V-ing perfect
I should not have preboarded you should not have preboarded he should not have preboarded we should not have preboarded you should not have preboarded they should not have preboarded	I should not have been preboarding you should not have been preboarding he should not have been preboarding we should not have been preboarding you should not have been preboarding they should not have been preboarding

Interrogative form

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

Interro-negative form

Simple form	V-ing form
should I not preboard? should you not preboard? should he not preboard? should we not preboard? should you not preboard? should they not preboard?	should I not be preboarding? should you not be preboarding? should he not be preboarding? should we not be preboarding? should you not be preboarding? should they not be preboarding?
Perfect	V-ing perfect
should I not have preboarded? should you not have preboarded? should he not have preboarded? should we not have preboarded? should you not have preboarded? should they not have preboarded?	should I not have been preboarding? should you not have been preboarding? should he not have been preboarding? should we not have been preboarding? should you not have been preboarding? should they not have been preboarding?