I could activate you could activate he could activate we could activate you could activate they could activate
V-ing form
I could be activating you could be activating he could be activating we could be activating you could be activating they could be activating
Perfect
I could have activated you could have activated he could have activated we could have activated you could have activated they could have activated
V-ing perfect
I could have been activating you could have been activating he could have been activating we could have been activating you could have been activating they could have been activating
Negation
Simple form
I couldn't activate you couldn't activate he couldn't activate we couldn't activate you couldn't activate they couldn't activate
V-ing form
I couldn't be activating you couldn't be activating he couldn't be activating we couldn't be activating you couldn't be activating they couldn't be activating
Perfect
I couldn't have activated you couldn't have activated he couldn't have activated we couldn't have activated you couldn't have activated they couldn't have activated
V-ing perfect
I couldn't have been activating you couldn't have been activating he couldn't have been activating we couldn't have been activating you couldn't have been activating they couldn't have been activating
Interrogative form
Simple form
could I activate? could you activate? could he activate? could we activate? could you activate? could they activate?
V-ing form
could I be activating? could you be activating? could he be activating? could we be activating? could you be activating? could they be activating?
Perfect
could I have activated? could you have activated? could he have activated? could we have activated? could you have activated? could they have activated?
V-ing perfect
could I have been activating? could you have been activating? could he have been activating? could we have been activating? could you have been activating? could they have been activating?
Interro-negative form
Simple form
couldn't I activate? couldn't you activate? couldn't he activate? couldn't we activate? couldn't you activate? couldn't they activate?
V-ing form
couldn't I be activating? couldn't you be activating? couldn't he be activating? couldn't we be activating? couldn't you be activating? couldn't they be activating?
Perfect
couldn't I have activated? couldn't you have activated? couldn't he have activated? couldn't we have activated? couldn't you have activated? couldn't they have activated?
V-ing perfect
couldn't I have been activating? couldn't you have been activating? couldn't he have been activating? couldn't we have been activating? couldn't you have been activating? couldn't they have been activating?