English verb conjugation
SHOULD PREPLAN

Regular verb: preplan - preplaned - preplaned

Affirmation

Simple form	V-ing form
I'd preplan you'd preplan she'd preplan we'd preplan you'd preplan they'd preplan	I'd be preplaning you'd be preplaning she'd be preplaning we'd be preplaning you'd be preplaning they'd be preplaning
Perfect	V-ing perfect
I should've preplaned you should've preplaned she should've preplaned we should've preplaned you should've preplaned they should've preplaned	I should've been preplaning you should've been preplaning she should've been preplaning we should've been preplaning you should've been preplaning they should've been preplaning

Negation

Simple form	V-ing form
I shouldn't preplan you shouldn't preplan she shouldn't preplan we shouldn't preplan you shouldn't preplan they shouldn't preplan	I shouldn't be preplaning you shouldn't be preplaning she shouldn't be preplaning we shouldn't be preplaning you shouldn't be preplaning they shouldn't be preplaning
Perfect	V-ing perfect
I shouldn't have preplaned you shouldn't have preplaned she shouldn't have preplaned we shouldn't have preplaned you shouldn't have preplaned they shouldn't have preplaned	I shouldn't have been preplaning you shouldn't have been preplaning she shouldn't have been preplaning we shouldn't have been preplaning you shouldn't have been preplaning they shouldn't have been preplaning

Interrogative form

Simple form	V-ing form
should I preplan? should you preplan? should she preplan? should we preplan? should you preplan? should they preplan?	should I be preplaning? should you be preplaning? should she be preplaning? should we be preplaning? should you be preplaning? should they be preplaning?
Perfect	V-ing perfect
should I have preplaned? should you have preplaned? should she have preplaned? should we have preplaned? should you have preplaned? should they have preplaned?	should I have been preplaning? should you have been preplaning? should she have been preplaning? should we have been preplaning? should you have been preplaning? should they have been preplaning?

Interro-negative form

Simple form	V-ing form
shouldn't I preplan? shouldn't you preplan? shouldn't she preplan? shouldn't we preplan? shouldn't you preplan? shouldn't they preplan?	shouldn't I be preplaning? shouldn't you be preplaning? shouldn't she be preplaning? shouldn't we be preplaning? shouldn't you be preplaning? shouldn't they be preplaning?
Perfect	V-ing perfect
shouldn't I have preplaned? shouldn't you have preplaned? shouldn't she have preplaned? shouldn't we have preplaned? shouldn't you have preplaned? shouldn't they have preplaned?	shouldn't I have been preplaning? shouldn't you have been preplaning? shouldn't she have been preplaning? shouldn't we have been preplaning? shouldn't you have been preplaning? shouldn't they have been preplaning?