I could gibbet you could gibbet he could gibbet we could gibbet you could gibbet they could gibbet
V-ing form
I could be gibbeting you could be gibbeting he could be gibbeting we could be gibbeting you could be gibbeting they could be gibbeting
Perfect
I could have gibbeted you could have gibbeted he could have gibbeted we could have gibbeted you could have gibbeted they could have gibbeted
V-ing perfect
I could have been gibbeting you could have been gibbeting he could have been gibbeting we could have been gibbeting you could have been gibbeting they could have been gibbeting
Negation
Simple form
I couldn't gibbet you couldn't gibbet he couldn't gibbet we couldn't gibbet you couldn't gibbet they couldn't gibbet
V-ing form
I couldn't be gibbeting you couldn't be gibbeting he couldn't be gibbeting we couldn't be gibbeting you couldn't be gibbeting they couldn't be gibbeting
Perfect
I couldn't have gibbeted you couldn't have gibbeted he couldn't have gibbeted we couldn't have gibbeted you couldn't have gibbeted they couldn't have gibbeted
V-ing perfect
I couldn't have been gibbeting you couldn't have been gibbeting he couldn't have been gibbeting we couldn't have been gibbeting you couldn't have been gibbeting they couldn't have been gibbeting
Interrogative form
Simple form
could I gibbet? could you gibbet? could he gibbet? could we gibbet? could you gibbet? could they gibbet?
V-ing form
could I be gibbeting? could you be gibbeting? could he be gibbeting? could we be gibbeting? could you be gibbeting? could they be gibbeting?
Perfect
could I have gibbeted? could you have gibbeted? could he have gibbeted? could we have gibbeted? could you have gibbeted? could they have gibbeted?
V-ing perfect
could I have been gibbeting? could you have been gibbeting? could he have been gibbeting? could we have been gibbeting? could you have been gibbeting? could they have been gibbeting?
Interro-negative form
Simple form
couldn't I gibbet? couldn't you gibbet? couldn't he gibbet? couldn't we gibbet? couldn't you gibbet? couldn't they gibbet?
V-ing form
couldn't I be gibbeting? couldn't you be gibbeting? couldn't he be gibbeting? couldn't we be gibbeting? couldn't you be gibbeting? couldn't they be gibbeting?
Perfect
couldn't I have gibbeted? couldn't you have gibbeted? couldn't he have gibbeted? couldn't we have gibbeted? couldn't you have gibbeted? couldn't they have gibbeted?
V-ing perfect
couldn't I have been gibbeting? couldn't you have been gibbeting? couldn't he have been gibbeting? couldn't we have been gibbeting? couldn't you have been gibbeting? couldn't they have been gibbeting?