I could hand you could hand he could hand we could hand you could hand they could hand
V-ing form
I could be handing you could be handing he could be handing we could be handing you could be handing they could be handing
Perfect
I could have handed you could have handed he could have handed we could have handed you could have handed they could have handed
V-ing perfect
I could have been handing you could have been handing he could have been handing we could have been handing you could have been handing they could have been handing
Negation
Simple form
I could not hand you could not hand he could not hand we could not hand you could not hand they could not hand
V-ing form
I could not be handing you could not be handing he could not be handing we could not be handing you could not be handing they could not be handing
Perfect
I could not have handed you could not have handed he could not have handed we could not have handed you could not have handed they could not have handed
V-ing perfect
I could not have been handing you could not have been handing he could not have been handing we could not have been handing you could not have been handing they could not have been handing
Interrogative form
Simple form
could I hand? could you hand? could he hand? could we hand? could you hand? could they hand?
V-ing form
could I be handing? could you be handing? could he be handing? could we be handing? could you be handing? could they be handing?
Perfect
could I have handed? could you have handed? could he have handed? could we have handed? could you have handed? could they have handed?
V-ing perfect
could I have been handing? could you have been handing? could he have been handing? could we have been handing? could you have been handing? could they have been handing?
Interro-negative form
Simple form
could I not hand? could you not hand? could he not hand? could we not hand? could you not hand? could they not hand?
V-ing form
could I not be handing? could you not be handing? could he not be handing? could we not be handing? could you not be handing? could they not be handing?
Perfect
could I not have handed? could you not have handed? could he not have handed? could we not have handed? could you not have handed? could they not have handed?
V-ing perfect
could I not have been handing? could you not have been handing? could he not have been handing? could we not have been handing? could you not have been handing? could they not have been handing?