I could countermine you could countermine he could countermine we could countermine you could countermine they could countermine
V-ing form
I could be countermining you could be countermining he could be countermining we could be countermining you could be countermining they could be countermining
Perfect
I could have countermined you could have countermined he could have countermined we could have countermined you could have countermined they could have countermined
V-ing perfect
I could have been countermining you could have been countermining he could have been countermining we could have been countermining you could have been countermining they could have been countermining
Negation
Simple form
I could not countermine you could not countermine he could not countermine we could not countermine you could not countermine they could not countermine
V-ing form
I could not be countermining you could not be countermining he could not be countermining we could not be countermining you could not be countermining they could not be countermining
Perfect
I could not have countermined you could not have countermined he could not have countermined we could not have countermined you could not have countermined they could not have countermined
V-ing perfect
I could not have been countermining you could not have been countermining he could not have been countermining we could not have been countermining you could not have been countermining they could not have been countermining
Interrogative form
Simple form
could I countermine? could you countermine? could he countermine? could we countermine? could you countermine? could they countermine?
V-ing form
could I be countermining? could you be countermining? could he be countermining? could we be countermining? could you be countermining? could they be countermining?
Perfect
could I have countermined? could you have countermined? could he have countermined? could we have countermined? could you have countermined? could they have countermined?
V-ing perfect
could I have been countermining? could you have been countermining? could he have been countermining? could we have been countermining? could you have been countermining? could they have been countermining?
Interro-negative form
Simple form
could I not countermine? could you not countermine? could he not countermine? could we not countermine? could you not countermine? could they not countermine?
V-ing form
could I not be countermining? could you not be countermining? could he not be countermining? could we not be countermining? could you not be countermining? could they not be countermining?
Perfect
could I not have countermined? could you not have countermined? could he not have countermined? could we not have countermined? could you not have countermined? could they not have countermined?
V-ing perfect
could I not have been countermining? could you not have been countermining? could he not have been countermining? could we not have been countermining? could you not have been countermining? could they not have been countermining?