I could blockade you could blockade he could blockade we could blockade you could blockade they could blockade
V-ing form
I could be blockading you could be blockading he could be blockading we could be blockading you could be blockading they could be blockading
Perfect
I could have blockaded you could have blockaded he could have blockaded we could have blockaded you could have blockaded they could have blockaded
V-ing perfect
I could have been blockading you could have been blockading he could have been blockading we could have been blockading you could have been blockading they could have been blockading
Negation
Simple form
I could not blockade you could not blockade he could not blockade we could not blockade you could not blockade they could not blockade
V-ing form
I could not be blockading you could not be blockading he could not be blockading we could not be blockading you could not be blockading they could not be blockading
Perfect
I could not have blockaded you could not have blockaded he could not have blockaded we could not have blockaded you could not have blockaded they could not have blockaded
V-ing perfect
I could not have been blockading you could not have been blockading he could not have been blockading we could not have been blockading you could not have been blockading they could not have been blockading
Interrogative form
Simple form
could I blockade? could you blockade? could he blockade? could we blockade? could you blockade? could they blockade?
V-ing form
could I be blockading? could you be blockading? could he be blockading? could we be blockading? could you be blockading? could they be blockading?
Perfect
could I have blockaded? could you have blockaded? could he have blockaded? could we have blockaded? could you have blockaded? could they have blockaded?
V-ing perfect
could I have been blockading? could you have been blockading? could he have been blockading? could we have been blockading? could you have been blockading? could they have been blockading?
Interro-negative form
Simple form
could I not blockade? could you not blockade? could he not blockade? could we not blockade? could you not blockade? could they not blockade?
V-ing form
could I not be blockading? could you not be blockading? could he not be blockading? could we not be blockading? could you not be blockading? could they not be blockading?
Perfect
could I not have blockaded? could you not have blockaded? could he not have blockaded? could we not have blockaded? could you not have blockaded? could they not have blockaded?
V-ing perfect
could I not have been blockading? could you not have been blockading? could he not have been blockading? could we not have been blockading? could you not have been blockading? could they not have been blockading?