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