English verb conjugation
CAN PLACE

Regular verb: place - placed - placed

Affirmation

Simple form	V-ing form
I can place you can place he can place we can place you can place they can place	I can be placing you can be placing he can be placing we can be placing you can be placing they can be placing
Perfect	V-ing perfect
I can have placed you can have placed he can have placed we can have placed you can have placed they can have placed	I can have been placing you can have been placing he can have been placing we can have been placing you can have been placing they can have been placing

Negation

Simple form	V-ing form
I can't place you can't place he can't place we can't place you can't place they can't place	I can't be placing you can't be placing he can't be placing we can't be placing you can't be placing they can't be placing
Perfect	V-ing perfect
I can't have placed you can't have placed he can't have placed we can't have placed you can't have placed they can't have placed	I can't have been placing you can't have been placing he can't have been placing we can't have been placing you can't have been placing they can't have been placing

Interrogative form

Simple form	V-ing form
can I place? can you place? can he place? can we place? can you place? can they place?	can I be placing? can you be placing? can he be placing? can we be placing? can you be placing? can they be placing?
Perfect	V-ing perfect
can I have placed? can you have placed? can he have placed? can we have placed? can you have placed? can they have placed?	can I have been placing? can you have been placing? can he have been placing? can we have been placing? can you have been placing? can they have been placing?

Interro-negative form

Simple form	V-ing form
can't I place? can't you place? can't he place? can't we place? can't you place? can't they place?	can't I be placing? can't you be placing? can't he be placing? can't we be placing? can't you be placing? can't they be placing?
Perfect	V-ing perfect
can't I have placed? can't you have placed? can't he have placed? can't we have placed? can't you have placed? can't they have placed?	can't I have been placing? can't you have been placing? can't he have been placing? can't we have been placing? can't you have been placing? can't they have been placing?