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 could not shit you could not shit he could not shit we could not shit you could not shit they could not shit
V-ing form
I could not be shitting you could not be shitting he could not be shitting we could not be shitting you could not be shitting they could not be shitting
Perfect
I could not have shit, shat you could not have shit, shat he could not have shit, shat we could not have shit, shat you could not have shit, shat they could not have shit, shat
V-ing perfect
I could not have been shitting you could not have been shitting he could not have been shitting we could not have been shitting you could not have been shitting they could not 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
could I not shit? could you not shit? could he not shit? could we not shit? could you not shit? could they not shit?
V-ing form
could I not be shitting? could you not be shitting? could he not be shitting? could we not be shitting? could you not be shitting? could they not be shitting?
Perfect
could I not have shit, shat? could you not have shit, shat? could he not have shit, shat? could we not have shit, shat? could you not have shit, shat? could they not have shit, shat?
V-ing perfect
could I not have been shitting? could you not have been shitting? could he not have been shitting? could we not have been shitting? could you not have been shitting? could they not have been shitting?