I can activate you can activate he can activate we can activate you can activate they can activate
V-ing form
I can be activating you can be activating he can be activating we can be activating you can be activating they can be activating
Perfect
I can have activated you can have activated he can have activated we can have activated you can have activated they can have activated
V-ing perfect
I can have been activating you can have been activating he can have been activating we can have been activating you can have been activating they can have been activating
Negation
Simple form
I cannot activate you cannot activate he cannot activate we cannot activate you cannot activate they cannot activate
V-ing form
I cannot be activating you cannot be activating he cannot be activating we cannot be activating you cannot be activating they cannot be activating
Perfect
I cannot have activated you cannot have activated he cannot have activated we cannot have activated you cannot have activated they cannot have activated
V-ing perfect
I cannot have been activating you cannot have been activating he cannot have been activating we cannot have been activating you cannot have been activating they cannot have been activating
Interrogative form
Simple form
can I activate? can you activate? can he activate? can we activate? can you activate? can they activate?
V-ing form
can I be activating? can you be activating? can he be activating? can we be activating? can you be activating? can they be activating?
Perfect
can I have activated? can you have activated? can he have activated? can we have activated? can you have activated? can they have activated?
V-ing perfect
can I have been activating? can you have been activating? can he have been activating? can we have been activating? can you have been activating? can they have been activating?
Interro-negative form
Simple form
can I not activate? can you not activate? can he not activate? can we not activate? can you not activate? can they not activate?
V-ing form
can I not be activating? can you not be activating? can he not be activating? can we not be activating? can you not be activating? can they not be activating?
Perfect
can I not have activated? can you not have activated? can he not have activated? can we not have activated? can you not have activated? can they not have activated?
V-ing perfect
can I not have been activating? can you not have been activating? can he not have been activating? can we not have been activating? can you not have been activating? can they not have been activating?