English verb conjugation
SHOULD INVENT

Regular verb: invent - invented - invented

Affirmation

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

Negation

Simple form	V-ing form
I should not invent you should not invent he should not invent we should not invent you should not invent they should not invent	I should not be inventing you should not be inventing he should not be inventing we should not be inventing you should not be inventing they should not be inventing
Perfect	V-ing perfect
I should not have invented you should not have invented he should not have invented we should not have invented you should not have invented they should not have invented	I should not have been inventing you should not have been inventing he should not have been inventing we should not have been inventing you should not have been inventing they should not 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
should I not invent? should you not invent? should he not invent? should we not invent? should you not invent? should they not invent?	should I not be inventing? should you not be inventing? should he not be inventing? should we not be inventing? should you not be inventing? should they not be inventing?
Perfect	V-ing perfect
should I not have invented? should you not have invented? should he not have invented? should we not have invented? should you not have invented? should they not have invented?	should I not have been inventing? should you not have been inventing? should he not have been inventing? should we not have been inventing? should you not have been inventing? should they not have been inventing?