English verb conjugation
SHOULD CHECK

Regular verb: check - checked - checked

Affirmation

Simple form	V-ing form
I'd check you'd check he'd check we'd check you'd check they'd check	I'd be checking you'd be checking he'd be checking we'd be checking you'd be checking they'd be checking
Perfect	V-ing perfect
I should've checked you should've checked he should've checked we should've checked you should've checked they should've checked	I should've been checking you should've been checking he should've been checking we should've been checking you should've been checking they should've been checking

Negation

Simple form	V-ing form
I shouldn't check you shouldn't check he shouldn't check we shouldn't check you shouldn't check they shouldn't check	I shouldn't be checking you shouldn't be checking he shouldn't be checking we shouldn't be checking you shouldn't be checking they shouldn't be checking
Perfect	V-ing perfect
I shouldn't have checked you shouldn't have checked he shouldn't have checked we shouldn't have checked you shouldn't have checked they shouldn't have checked	I shouldn't have been checking you shouldn't have been checking he shouldn't have been checking we shouldn't have been checking you shouldn't have been checking they shouldn't have been checking

Interrogative form

Simple form	V-ing form
should I check? should you check? should he check? should we check? should you check? should they check?	should I be checking? should you be checking? should he be checking? should we be checking? should you be checking? should they be checking?
Perfect	V-ing perfect
should I have checked? should you have checked? should he have checked? should we have checked? should you have checked? should they have checked?	should I have been checking? should you have been checking? should he have been checking? should we have been checking? should you have been checking? should they have been checking?

Interro-negative form

Simple form	V-ing form
shouldn't I check? shouldn't you check? shouldn't he check? shouldn't we check? shouldn't you check? shouldn't they check?	shouldn't I be checking? shouldn't you be checking? shouldn't he be checking? shouldn't we be checking? shouldn't you be checking? shouldn't they be checking?
Perfect	V-ing perfect
shouldn't I have checked? shouldn't you have checked? shouldn't he have checked? shouldn't we have checked? shouldn't you have checked? shouldn't they have checked?	shouldn't I have been checking? shouldn't you have been checking? shouldn't he have been checking? shouldn't we have been checking? shouldn't you have been checking? shouldn't they have been checking?