English verb conjugation
SHOULD CREDIT

Regular verb: credit - credited - credited

Affirmation

Simple form	V-ing form
I'd credit you'd credit he'd credit we'd credit you'd credit they'd credit	I'd be crediting you'd be crediting he'd be crediting we'd be crediting you'd be crediting they'd be crediting
Perfect	V-ing perfect
I should've credited you should've credited he should've credited we should've credited you should've credited they should've credited	I should've been crediting you should've been crediting he should've been crediting we should've been crediting you should've been crediting they should've been crediting

Negation

Simple form	V-ing form
I shouldn't credit you shouldn't credit he shouldn't credit we shouldn't credit you shouldn't credit they shouldn't credit	I shouldn't be crediting you shouldn't be crediting he shouldn't be crediting we shouldn't be crediting you shouldn't be crediting they shouldn't be crediting
Perfect	V-ing perfect
I shouldn't have credited you shouldn't have credited he shouldn't have credited we shouldn't have credited you shouldn't have credited they shouldn't have credited	I shouldn't have been crediting you shouldn't have been crediting he shouldn't have been crediting we shouldn't have been crediting you shouldn't have been crediting they shouldn't have been crediting

Interrogative form

Simple form	V-ing form
should I credit? should you credit? should he credit? should we credit? should you credit? should they credit?	should I be crediting? should you be crediting? should he be crediting? should we be crediting? should you be crediting? should they be crediting?
Perfect	V-ing perfect
should I have credited? should you have credited? should he have credited? should we have credited? should you have credited? should they have credited?	should I have been crediting? should you have been crediting? should he have been crediting? should we have been crediting? should you have been crediting? should they have been crediting?

Interro-negative form

Simple form	V-ing form
shouldn't I credit? shouldn't you credit? shouldn't he credit? shouldn't we credit? shouldn't you credit? shouldn't they credit?	shouldn't I be crediting? shouldn't you be crediting? shouldn't he be crediting? shouldn't we be crediting? shouldn't you be crediting? shouldn't they be crediting?
Perfect	V-ing perfect
shouldn't I have credited? shouldn't you have credited? shouldn't he have credited? shouldn't we have credited? shouldn't you have credited? shouldn't they have credited?	shouldn't I have been crediting? shouldn't you have been crediting? shouldn't he have been crediting? shouldn't we have been crediting? shouldn't you have been crediting? shouldn't they have been crediting?