should invent
Regular verb: invent - invented- invented

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?