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