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