English verb conjugation
SHOULD NULL

Regular verb: null - nulled - nulled

Affirmation

Simple form	V-ing form
I'd null you'd null she'd null we'd null you'd null they'd null	I'd be nulling you'd be nulling she'd be nulling we'd be nulling you'd be nulling they'd be nulling
Perfect	V-ing perfect
I should've nulled you should've nulled she should've nulled we should've nulled you should've nulled they should've nulled	I should've been nulling you should've been nulling she should've been nulling we should've been nulling you should've been nulling they should've been nulling

Negation

Simple form	V-ing form
I shouldn't null you shouldn't null she shouldn't null we shouldn't null you shouldn't null they shouldn't null	I shouldn't be nulling you shouldn't be nulling she shouldn't be nulling we shouldn't be nulling you shouldn't be nulling they shouldn't be nulling
Perfect	V-ing perfect
I shouldn't have nulled you shouldn't have nulled she shouldn't have nulled we shouldn't have nulled you shouldn't have nulled they shouldn't have nulled	I shouldn't have been nulling you shouldn't have been nulling she shouldn't have been nulling we shouldn't have been nulling you shouldn't have been nulling they shouldn't have been nulling

Interrogative form

Simple form	V-ing form
should I null? should you null? should she null? should we null? should you null? should they null?	should I be nulling? should you be nulling? should she be nulling? should we be nulling? should you be nulling? should they be nulling?
Perfect	V-ing perfect
should I have nulled? should you have nulled? should she have nulled? should we have nulled? should you have nulled? should they have nulled?	should I have been nulling? should you have been nulling? should she have been nulling? should we have been nulling? should you have been nulling? should they have been nulling?

Interro-negative form

Simple form	V-ing form
shouldn't I null? shouldn't you null? shouldn't she null? shouldn't we null? shouldn't you null? shouldn't they null?	shouldn't I be nulling? shouldn't you be nulling? shouldn't she be nulling? shouldn't we be nulling? shouldn't you be nulling? shouldn't they be nulling?
Perfect	V-ing perfect
shouldn't I have nulled? shouldn't you have nulled? shouldn't she have nulled? shouldn't we have nulled? shouldn't you have nulled? shouldn't they have nulled?	shouldn't I have been nulling? shouldn't you have been nulling? shouldn't she have been nulling? shouldn't we have been nulling? shouldn't you have been nulling? shouldn't they have been nulling?