English verb conjugation
SHOULD BOARD

Regular verb: board - boarded - boarded

Affirmation

Simple form	V-ing form
I'd board you'd board she'd board we'd board you'd board they'd board	I'd be boarding you'd be boarding she'd be boarding we'd be boarding you'd be boarding they'd be boarding
Perfect	V-ing perfect
I should've boarded you should've boarded she should've boarded we should've boarded you should've boarded they should've boarded	I should've been boarding you should've been boarding she should've been boarding we should've been boarding you should've been boarding they should've been boarding

Negation

Simple form	V-ing form
I shouldn't board you shouldn't board she shouldn't board we shouldn't board you shouldn't board they shouldn't board	I shouldn't be boarding you shouldn't be boarding she shouldn't be boarding we shouldn't be boarding you shouldn't be boarding they shouldn't be boarding
Perfect	V-ing perfect
I shouldn't have boarded you shouldn't have boarded she shouldn't have boarded we shouldn't have boarded you shouldn't have boarded they shouldn't have boarded	I shouldn't have been boarding you shouldn't have been boarding she shouldn't have been boarding we shouldn't have been boarding you shouldn't have been boarding they shouldn't have been boarding

Interrogative form

Simple form	V-ing form
should I board? should you board? should she board? should we board? should you board? should they board?	should I be boarding? should you be boarding? should she be boarding? should we be boarding? should you be boarding? should they be boarding?
Perfect	V-ing perfect
should I have boarded? should you have boarded? should she have boarded? should we have boarded? should you have boarded? should they have boarded?	should I have been boarding? should you have been boarding? should she have been boarding? should we have been boarding? should you have been boarding? should they have been boarding?

Interro-negative form

Simple form	V-ing form
shouldn't I board? shouldn't you board? shouldn't she board? shouldn't we board? shouldn't you board? shouldn't they board?	shouldn't I be boarding? shouldn't you be boarding? shouldn't she be boarding? shouldn't we be boarding? shouldn't you be boarding? shouldn't they be boarding?
Perfect	V-ing perfect
shouldn't I have boarded? shouldn't you have boarded? shouldn't she have boarded? shouldn't we have boarded? shouldn't you have boarded? shouldn't they have boarded?	shouldn't I have been boarding? shouldn't you have been boarding? shouldn't she have been boarding? shouldn't we have been boarding? shouldn't you have been boarding? shouldn't they have been boarding?