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