I could cordon you could cordon she could cordon we could cordon you could cordon they could cordon
V-ing form
I could be cordoning you could be cordoning she could be cordoning we could be cordoning you could be cordoning they could be cordoning
Perfect
I could have cordoned you could have cordoned she could have cordoned we could have cordoned you could have cordoned they could have cordoned
V-ing perfect
I could have been cordoning you could have been cordoning she could have been cordoning we could have been cordoning you could have been cordoning they could have been cordoning
Negation
Simple form
I could not cordon you could not cordon she could not cordon we could not cordon you could not cordon they could not cordon
V-ing form
I could not be cordoning you could not be cordoning she could not be cordoning we could not be cordoning you could not be cordoning they could not be cordoning
Perfect
I could not have cordoned you could not have cordoned she could not have cordoned we could not have cordoned you could not have cordoned they could not have cordoned
V-ing perfect
I could not have been cordoning you could not have been cordoning she could not have been cordoning we could not have been cordoning you could not have been cordoning they could not have been cordoning
Interrogative form
Simple form
could I cordon? could you cordon? could she cordon? could we cordon? could you cordon? could they cordon?
V-ing form
could I be cordoning? could you be cordoning? could she be cordoning? could we be cordoning? could you be cordoning? could they be cordoning?
Perfect
could I have cordoned? could you have cordoned? could she have cordoned? could we have cordoned? could you have cordoned? could they have cordoned?
V-ing perfect
could I have been cordoning? could you have been cordoning? could she have been cordoning? could we have been cordoning? could you have been cordoning? could they have been cordoning?
Interro-negative form
Simple form
could I not cordon? could you not cordon? could she not cordon? could we not cordon? could you not cordon? could they not cordon?
V-ing form
could I not be cordoning? could you not be cordoning? could she not be cordoning? could we not be cordoning? could you not be cordoning? could they not be cordoning?
Perfect
could I not have cordoned? could you not have cordoned? could she not have cordoned? could we not have cordoned? could you not have cordoned? could they not have cordoned?
V-ing perfect
could I not have been cordoning? could you not have been cordoning? could she not have been cordoning? could we not have been cordoning? could you not have been cordoning? could they not have been cordoning?