English verb conjugation
SHOULD BASE

Regular verb: base - based - based

Affirmation

Simple form	V-ing form
I'd base you'd base he'd base we'd base you'd base they'd base	I'd be basing you'd be basing he'd be basing we'd be basing you'd be basing they'd be basing
Perfect	V-ing perfect
I should've based you should've based he should've based we should've based you should've based they should've based	I should've been basing you should've been basing he should've been basing we should've been basing you should've been basing they should've been basing

Negation

Simple form	V-ing form
I shouldn't base you shouldn't base he shouldn't base we shouldn't base you shouldn't base they shouldn't base	I shouldn't be basing you shouldn't be basing he shouldn't be basing we shouldn't be basing you shouldn't be basing they shouldn't be basing
Perfect	V-ing perfect
I shouldn't have based you shouldn't have based he shouldn't have based we shouldn't have based you shouldn't have based they shouldn't have based	I shouldn't have been basing you shouldn't have been basing he shouldn't have been basing we shouldn't have been basing you shouldn't have been basing they shouldn't have been basing

Interrogative form

Simple form	V-ing form
should I base? should you base? should he base? should we base? should you base? should they base?	should I be basing? should you be basing? should he be basing? should we be basing? should you be basing? should they be basing?
Perfect	V-ing perfect
should I have based? should you have based? should he have based? should we have based? should you have based? should they have based?	should I have been basing? should you have been basing? should he have been basing? should we have been basing? should you have been basing? should they have been basing?

Interro-negative form

Simple form	V-ing form
shouldn't I base? shouldn't you base? shouldn't he base? shouldn't we base? shouldn't you base? shouldn't they base?	shouldn't I be basing? shouldn't you be basing? shouldn't he be basing? shouldn't we be basing? shouldn't you be basing? shouldn't they be basing?
Perfect	V-ing perfect
shouldn't I have based? shouldn't you have based? shouldn't he have based? shouldn't we have based? shouldn't you have based? shouldn't they have based?	shouldn't I have been basing? shouldn't you have been basing? shouldn't he have been basing? shouldn't we have been basing? shouldn't you have been basing? shouldn't they have been basing?