English verb conjugation
SHOULD START

Regular verb: start - started - started

Affirmation

Simple form	V-ing form
I'd start you'd start he'd start we'd start you'd start they'd start	I'd be starting you'd be starting he'd be starting we'd be starting you'd be starting they'd be starting
Perfect	V-ing perfect
I should've started you should've started he should've started we should've started you should've started they should've started	I should've been starting you should've been starting he should've been starting we should've been starting you should've been starting they should've been starting

Negation

Simple form	V-ing form
I shouldn't start you shouldn't start he shouldn't start we shouldn't start you shouldn't start they shouldn't start	I shouldn't be starting you shouldn't be starting he shouldn't be starting we shouldn't be starting you shouldn't be starting they shouldn't be starting
Perfect	V-ing perfect
I shouldn't have started you shouldn't have started he shouldn't have started we shouldn't have started you shouldn't have started they shouldn't have started	I shouldn't have been starting you shouldn't have been starting he shouldn't have been starting we shouldn't have been starting you shouldn't have been starting they shouldn't have been starting

Interrogative form

Simple form	V-ing form
should I start? should you start? should he start? should we start? should you start? should they start?	should I be starting? should you be starting? should he be starting? should we be starting? should you be starting? should they be starting?
Perfect	V-ing perfect
should I have started? should you have started? should he have started? should we have started? should you have started? should they have started?	should I have been starting? should you have been starting? should he have been starting? should we have been starting? should you have been starting? should they have been starting?

Interro-negative form

Simple form	V-ing form
shouldn't I start? shouldn't you start? shouldn't he start? shouldn't we start? shouldn't you start? shouldn't they start?	shouldn't I be starting? shouldn't you be starting? shouldn't he be starting? shouldn't we be starting? shouldn't you be starting? shouldn't they be starting?
Perfect	V-ing perfect
shouldn't I have started? shouldn't you have started? shouldn't he have started? shouldn't we have started? shouldn't you have started? shouldn't they have started?	shouldn't I have been starting? shouldn't you have been starting? shouldn't he have been starting? shouldn't we have been starting? shouldn't you have been starting? shouldn't they have been starting?