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 can't activate you can't activate he can't activate we can't activate you can't activate they can't activate
V-ing form
I can't be activating you can't be activating he can't be activating we can't be activating you can't be activating they can't be activating
Perfect
I can't have activated you can't have activated he can't have activated we can't have activated you can't have activated they can't have activated
V-ing perfect
I can't have been activating you can't have been activating he can't have been activating we can't have been activating you can't have been activating they can't 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't I activate? can't you activate? can't he activate? can't we activate? can't you activate? can't they activate?
V-ing form
can't I be activating? can't you be activating? can't he be activating? can't we be activating? can't you be activating? can't they be activating?
Perfect
can't I have activated? can't you have activated? can't he have activated? can't we have activated? can't you have activated? can't they have activated?
V-ing perfect
can't I have been activating? can't you have been activating? can't he have been activating? can't we have been activating? can't you have been activating? can't they have been activating?