English verb conjugation
SHOULD LOCK

Regular verb: lock - locked - locked

Affirmation

Simple form	V-ing form
I'd lock you'd lock he'd lock we'd lock you'd lock they'd lock	I'd be locking you'd be locking he'd be locking we'd be locking you'd be locking they'd be locking
Perfect	V-ing perfect
I should've locked you should've locked he should've locked we should've locked you should've locked they should've locked	I should've been locking you should've been locking he should've been locking we should've been locking you should've been locking they should've been locking

Negation

Simple form	V-ing form
I shouldn't lock you shouldn't lock he shouldn't lock we shouldn't lock you shouldn't lock they shouldn't lock	I shouldn't be locking you shouldn't be locking he shouldn't be locking we shouldn't be locking you shouldn't be locking they shouldn't be locking
Perfect	V-ing perfect
I shouldn't have locked you shouldn't have locked he shouldn't have locked we shouldn't have locked you shouldn't have locked they shouldn't have locked	I shouldn't have been locking you shouldn't have been locking he shouldn't have been locking we shouldn't have been locking you shouldn't have been locking they shouldn't have been locking

Interrogative form

Simple form	V-ing form
should I lock? should you lock? should he lock? should we lock? should you lock? should they lock?	should I be locking? should you be locking? should he be locking? should we be locking? should you be locking? should they be locking?
Perfect	V-ing perfect
should I have locked? should you have locked? should he have locked? should we have locked? should you have locked? should they have locked?	should I have been locking? should you have been locking? should he have been locking? should we have been locking? should you have been locking? should they have been locking?

Interro-negative form

Simple form	V-ing form
shouldn't I lock? shouldn't you lock? shouldn't he lock? shouldn't we lock? shouldn't you lock? shouldn't they lock?	shouldn't I be locking? shouldn't you be locking? shouldn't he be locking? shouldn't we be locking? shouldn't you be locking? shouldn't they be locking?
Perfect	V-ing perfect
shouldn't I have locked? shouldn't you have locked? shouldn't he have locked? shouldn't we have locked? shouldn't you have locked? shouldn't they have locked?	shouldn't I have been locking? shouldn't you have been locking? shouldn't he have been locking? shouldn't we have been locking? shouldn't you have been locking? shouldn't they have been locking?