English verb conjugation
SHOULD INVENT

Regular verb: invent - invented - invented

Affirmation

Simple form	V-ing form
I'd invent you'd invent he'd invent we'd invent you'd invent they'd invent	I'd be inventing you'd be inventing he'd be inventing we'd be inventing you'd be inventing they'd be inventing
Perfect	V-ing perfect
I should've invented you should've invented he should've invented we should've invented you should've invented they should've invented	I should've been inventing you should've been inventing he should've been inventing we should've been inventing you should've been inventing they should've been inventing

Negation

Simple form	V-ing form
I shouldn't invent you shouldn't invent he shouldn't invent we shouldn't invent you shouldn't invent they shouldn't invent	I shouldn't be inventing you shouldn't be inventing he shouldn't be inventing we shouldn't be inventing you shouldn't be inventing they shouldn't be inventing
Perfect	V-ing perfect
I shouldn't have invented you shouldn't have invented he shouldn't have invented we shouldn't have invented you shouldn't have invented they shouldn't have invented	I shouldn't have been inventing you shouldn't have been inventing he shouldn't have been inventing we shouldn't have been inventing you shouldn't have been inventing they shouldn't have been inventing

Interrogative form

Simple form	V-ing form
should I invent? should you invent? should he invent? should we invent? should you invent? should they invent?	should I be inventing? should you be inventing? should he be inventing? should we be inventing? should you be inventing? should they be inventing?
Perfect	V-ing perfect
should I have invented? should you have invented? should he have invented? should we have invented? should you have invented? should they have invented?	should I have been inventing? should you have been inventing? should he have been inventing? should we have been inventing? should you have been inventing? should they have been inventing?

Interro-negative form

Simple form	V-ing form
shouldn't I invent? shouldn't you invent? shouldn't he invent? shouldn't we invent? shouldn't you invent? shouldn't they invent?	shouldn't I be inventing? shouldn't you be inventing? shouldn't he be inventing? shouldn't we be inventing? shouldn't you be inventing? shouldn't they be inventing?
Perfect	V-ing perfect
shouldn't I have invented? shouldn't you have invented? shouldn't he have invented? shouldn't we have invented? shouldn't you have invented? shouldn't they have invented?	shouldn't I have been inventing? shouldn't you have been inventing? shouldn't he have been inventing? shouldn't we have been inventing? shouldn't you have been inventing? shouldn't they have been inventing?