I could demit you could demit she could demit we could demit you could demit they could demit
V-ing form
I could be demiting you could be demiting she could be demiting we could be demiting you could be demiting they could be demiting
Perfect
I could have demited you could have demited she could have demited we could have demited you could have demited they could have demited
V-ing perfect
I could have been demiting you could have been demiting she could have been demiting we could have been demiting you could have been demiting they could have been demiting
Negation
Simple form
I couldn't demit you couldn't demit she couldn't demit we couldn't demit you couldn't demit they couldn't demit
V-ing form
I couldn't be demiting you couldn't be demiting she couldn't be demiting we couldn't be demiting you couldn't be demiting they couldn't be demiting
Perfect
I couldn't have demited you couldn't have demited she couldn't have demited we couldn't have demited you couldn't have demited they couldn't have demited
V-ing perfect
I couldn't have been demiting you couldn't have been demiting she couldn't have been demiting we couldn't have been demiting you couldn't have been demiting they couldn't have been demiting
Interrogative form
Simple form
could I demit? could you demit? could she demit? could we demit? could you demit? could they demit?
V-ing form
could I be demiting? could you be demiting? could she be demiting? could we be demiting? could you be demiting? could they be demiting?
Perfect
could I have demited? could you have demited? could she have demited? could we have demited? could you have demited? could they have demited?
V-ing perfect
could I have been demiting? could you have been demiting? could she have been demiting? could we have been demiting? could you have been demiting? could they have been demiting?
Interro-negative form
Simple form
couldn't I demit? couldn't you demit? couldn't she demit? couldn't we demit? couldn't you demit? couldn't they demit?
V-ing form
couldn't I be demiting? couldn't you be demiting? couldn't she be demiting? couldn't we be demiting? couldn't you be demiting? couldn't they be demiting?
Perfect
couldn't I have demited? couldn't you have demited? couldn't she have demited? couldn't we have demited? couldn't you have demited? couldn't they have demited?
V-ing perfect
couldn't I have been demiting? couldn't you have been demiting? couldn't she have been demiting? couldn't we have been demiting? couldn't you have been demiting? couldn't they have been demiting?