I could shit you could shit he could shit we could shit you could shit they could shit
V-ing form
I could be shitting you could be shitting he could be shitting we could be shitting you could be shitting they could be shitting
Perfect
I could have shit, shat you could have shit, shat he could have shit, shat we could have shit, shat you could have shit, shat they could have shit, shat
V-ing perfect
I could have been shitting you could have been shitting he could have been shitting we could have been shitting you could have been shitting they could have been shitting
Negation
Simple form
I couldn't shit you couldn't shit he couldn't shit we couldn't shit you couldn't shit they couldn't shit
V-ing form
I couldn't be shitting you couldn't be shitting he couldn't be shitting we couldn't be shitting you couldn't be shitting they couldn't be shitting
Perfect
I couldn't have shit, shat you couldn't have shit, shat he couldn't have shit, shat we couldn't have shit, shat you couldn't have shit, shat they couldn't have shit, shat
V-ing perfect
I couldn't have been shitting you couldn't have been shitting he couldn't have been shitting we couldn't have been shitting you couldn't have been shitting they couldn't have been shitting
Interrogative form
Simple form
could I shit? could you shit? could he shit? could we shit? could you shit? could they shit?
V-ing form
could I be shitting? could you be shitting? could he be shitting? could we be shitting? could you be shitting? could they be shitting?
Perfect
could I have shit, shat? could you have shit, shat? could he have shit, shat? could we have shit, shat? could you have shit, shat? could they have shit, shat?
V-ing perfect
could I have been shitting? could you have been shitting? could he have been shitting? could we have been shitting? could you have been shitting? could they have been shitting?
Interro-negative form
Simple form
couldn't I shit? couldn't you shit? couldn't he shit? couldn't we shit? couldn't you shit? couldn't they shit?
V-ing form
couldn't I be shitting? couldn't you be shitting? couldn't he be shitting? couldn't we be shitting? couldn't you be shitting? couldn't they be shitting?
Perfect
couldn't I have shit, shat? couldn't you have shit, shat? couldn't he have shit, shat? couldn't we have shit, shat? couldn't you have shit, shat? couldn't they have shit, shat?
V-ing perfect
couldn't I have been shitting? couldn't you have been shitting? couldn't he have been shitting? couldn't we have been shitting? couldn't you have been shitting? couldn't they have been shitting?