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