I should place you should place she should place we should place you should place they should place
V-ing form
I should be placing you should be placing she should be placing we should be placing you should be placing they should be placing
Perfect
I should have placed you should have placed she should have placed we should have placed you should have placed they should have placed
V-ing perfect
I should have been placing you should have been placing she should have been placing we should have been placing you should have been placing they should have been placing
Negation
Simple form
I should not place you should not place she should not place we should not place you should not place they should not place
V-ing form
I should not be placing you should not be placing she should not be placing we should not be placing you should not be placing they should not be placing
Perfect
I should not have placed you should not have placed she should not have placed we should not have placed you should not have placed they should not have placed
V-ing perfect
I should not have been placing you should not have been placing she should not have been placing we should not have been placing you should not have been placing they should not have been placing
Interrogative form
Simple form
should I place? should you place? should she place? should we place? should you place? should they place?
V-ing form
should I be placing? should you be placing? should she be placing? should we be placing? should you be placing? should they be placing?
Perfect
should I have placed? should you have placed? should she have placed? should we have placed? should you have placed? should they have placed?
V-ing perfect
should I have been placing? should you have been placing? should she have been placing? should we have been placing? should you have been placing? should they have been placing?
Interro-negative form
Simple form
should I not place? should you not place? should she not place? should we not place? should you not place? should they not place?
V-ing form
should I not be placing? should you not be placing? should she not be placing? should we not be placing? should you not be placing? should they not be placing?
Perfect
should I not have placed? should you not have placed? should she not have placed? should we not have placed? should you not have placed? should they not have placed?
V-ing perfect
should I not have been placing? should you not have been placing? should she not have been placing? should we not have been placing? should you not have been placing? should they not have been placing?