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