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 couldn't hand you couldn't hand he couldn't hand we couldn't hand you couldn't hand they couldn't hand
V-ing form
I couldn't be handing you couldn't be handing he couldn't be handing we couldn't be handing you couldn't be handing they couldn't be handing
Perfect
I couldn't have handed you couldn't have handed he couldn't have handed we couldn't have handed you couldn't have handed they couldn't have handed
V-ing perfect
I couldn't have been handing you couldn't have been handing he couldn't have been handing we couldn't have been handing you couldn't have been handing they couldn't 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
couldn't I hand? couldn't you hand? couldn't he hand? couldn't we hand? couldn't you hand? couldn't they hand?
V-ing form
couldn't I be handing? couldn't you be handing? couldn't he be handing? couldn't we be handing? couldn't you be handing? couldn't they be handing?
Perfect
couldn't I have handed? couldn't you have handed? couldn't he have handed? couldn't we have handed? couldn't you have handed? couldn't they have handed?
V-ing perfect
couldn't I have been handing? couldn't you have been handing? couldn't he have been handing? couldn't we have been handing? couldn't you have been handing? couldn't they have been handing?