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