I can poop you can poop she can poop we can poop you can poop they can poop
V-ing form
I can be pooping you can be pooping she can be pooping we can be pooping you can be pooping they can be pooping
Perfect
I can have pooped you can have pooped she can have pooped we can have pooped you can have pooped they can have pooped
V-ing perfect
I can have been pooping you can have been pooping she can have been pooping we can have been pooping you can have been pooping they can have been pooping
Negation
Simple form
I can't poop you can't poop she can't poop we can't poop you can't poop they can't poop
V-ing form
I can't be pooping you can't be pooping she can't be pooping we can't be pooping you can't be pooping they can't be pooping
Perfect
I can't have pooped you can't have pooped she can't have pooped we can't have pooped you can't have pooped they can't have pooped
V-ing perfect
I can't have been pooping you can't have been pooping she can't have been pooping we can't have been pooping you can't have been pooping they can't have been pooping
Interrogative form
Simple form
can I poop? can you poop? can she poop? can we poop? can you poop? can they poop?
V-ing form
can I be pooping? can you be pooping? can she be pooping? can we be pooping? can you be pooping? can they be pooping?
Perfect
can I have pooped? can you have pooped? can she have pooped? can we have pooped? can you have pooped? can they have pooped?
V-ing perfect
can I have been pooping? can you have been pooping? can she have been pooping? can we have been pooping? can you have been pooping? can they have been pooping?
Interro-negative form
Simple form
can't I poop? can't you poop? can't she poop? can't we poop? can't you poop? can't they poop?
V-ing form
can't I be pooping? can't you be pooping? can't she be pooping? can't we be pooping? can't you be pooping? can't they be pooping?
Perfect
can't I have pooped? can't you have pooped? can't she have pooped? can't we have pooped? can't you have pooped? can't they have pooped?
V-ing perfect
can't I have been pooping? can't you have been pooping? can't she have been pooping? can't we have been pooping? can't you have been pooping? can't they have been pooping?