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