I could awaken you could awaken he could awaken we could awaken you could awaken they could awaken
V-ing form
I could be awakening you could be awakening he could be awakening we could be awakening you could be awakening they could be awakening
Perfect
I could have awakened you could have awakened he could have awakened we could have awakened you could have awakened they could have awakened
V-ing perfect
I could have been awakening you could have been awakening he could have been awakening we could have been awakening you could have been awakening they could have been awakening
Negation
Simple form
I could not awaken you could not awaken he could not awaken we could not awaken you could not awaken they could not awaken
V-ing form
I could not be awakening you could not be awakening he could not be awakening we could not be awakening you could not be awakening they could not be awakening
Perfect
I could not have awakened you could not have awakened he could not have awakened we could not have awakened you could not have awakened they could not have awakened
V-ing perfect
I could not have been awakening you could not have been awakening he could not have been awakening we could not have been awakening you could not have been awakening they could not have been awakening
Interrogative form
Simple form
could I awaken? could you awaken? could he awaken? could we awaken? could you awaken? could they awaken?
V-ing form
could I be awakening? could you be awakening? could he be awakening? could we be awakening? could you be awakening? could they be awakening?
Perfect
could I have awakened? could you have awakened? could he have awakened? could we have awakened? could you have awakened? could they have awakened?
V-ing perfect
could I have been awakening? could you have been awakening? could he have been awakening? could we have been awakening? could you have been awakening? could they have been awakening?
Interro-negative form
Simple form
could I not awaken? could you not awaken? could he not awaken? could we not awaken? could you not awaken? could they not awaken?
V-ing form
could I not be awakening? could you not be awakening? could he not be awakening? could we not be awakening? could you not be awakening? could they not be awakening?
Perfect
could I not have awakened? could you not have awakened? could he not have awakened? could we not have awakened? could you not have awakened? could they not have awakened?
V-ing perfect
could I not have been awakening? could you not have been awakening? could he not have been awakening? could we not have been awakening? could you not have been awakening? could they not have been awakening?