I could somnambulate you could somnambulate he could somnambulate we could somnambulate you could somnambulate they could somnambulate
V-ing form
I could be somnambulating you could be somnambulating he could be somnambulating we could be somnambulating you could be somnambulating they could be somnambulating
Perfect
I could have somnambulated you could have somnambulated he could have somnambulated we could have somnambulated you could have somnambulated they could have somnambulated
V-ing perfect
I could have been somnambulating you could have been somnambulating he could have been somnambulating we could have been somnambulating you could have been somnambulating they could have been somnambulating
Negation
Simple form
I could not somnambulate you could not somnambulate he could not somnambulate we could not somnambulate you could not somnambulate they could not somnambulate
V-ing form
I could not be somnambulating you could not be somnambulating he could not be somnambulating we could not be somnambulating you could not be somnambulating they could not be somnambulating
Perfect
I could not have somnambulated you could not have somnambulated he could not have somnambulated we could not have somnambulated you could not have somnambulated they could not have somnambulated
V-ing perfect
I could not have been somnambulating you could not have been somnambulating he could not have been somnambulating we could not have been somnambulating you could not have been somnambulating they could not have been somnambulating
Interrogative form
Simple form
could I somnambulate? could you somnambulate? could he somnambulate? could we somnambulate? could you somnambulate? could they somnambulate?
V-ing form
could I be somnambulating? could you be somnambulating? could he be somnambulating? could we be somnambulating? could you be somnambulating? could they be somnambulating?
Perfect
could I have somnambulated? could you have somnambulated? could he have somnambulated? could we have somnambulated? could you have somnambulated? could they have somnambulated?
V-ing perfect
could I have been somnambulating? could you have been somnambulating? could he have been somnambulating? could we have been somnambulating? could you have been somnambulating? could they have been somnambulating?
Interro-negative form
Simple form
could I not somnambulate? could you not somnambulate? could he not somnambulate? could we not somnambulate? could you not somnambulate? could they not somnambulate?
V-ing form
could I not be somnambulating? could you not be somnambulating? could he not be somnambulating? could we not be somnambulating? could you not be somnambulating? could they not be somnambulating?
Perfect
could I not have somnambulated? could you not have somnambulated? could he not have somnambulated? could we not have somnambulated? could you not have somnambulated? could they not have somnambulated?
V-ing perfect
could I not have been somnambulating? could you not have been somnambulating? could he not have been somnambulating? could we not have been somnambulating? could you not have been somnambulating? could they not have been somnambulating?