I may cower you may cower he may cower we may cower you may cower they may cower
V-ing form
I may be cowering you may be cowering he may be cowering we may be cowering you may be cowering they may be cowering
Perfect
I may have cowered you may have cowered he may have cowered we may have cowered you may have cowered they may have cowered
V-ing perfect
I may have been cowering you may have been cowering he may have been cowering we may have been cowering you may have been cowering they may have been cowering
Negation
Simple form
I may not cower you may not cower he may not cower we may not cower you may not cower they may not cower
V-ing form
I may not be cowering you may not be cowering he may not be cowering we may not be cowering you may not be cowering they may not be cowering
Perfect
I may not have cowered you may not have cowered he may not have cowered we may not have cowered you may not have cowered they may not have cowered
V-ing perfect
I may not have been cowering you may not have been cowering he may not have been cowering we may not have been cowering you may not have been cowering they may not have been cowering
Interrogative form
Simple form
may I cower? may you cower? may he cower? may we cower? may you cower? may they cower?
V-ing form
may I be cowering? may you be cowering? may he be cowering? may we be cowering? may you be cowering? may they be cowering?
Perfect
may I have cowered? may you have cowered? may he have cowered? may we have cowered? may you have cowered? may they have cowered?
V-ing perfect
may I have been cowering? may you have been cowering? may he have been cowering? may we have been cowering? may you have been cowering? may they have been cowering?
Interro-negative form
Simple form
may I not cower? may you not cower? may he not cower? may we not cower? may you not cower? may they not cower?
V-ing form
may I not be cowering? may you not be cowering? may he not be cowering? may we not be cowering? may you not be cowering? may they not be cowering?
Perfect
may I not have cowered? may you not have cowered? may he not have cowered? may we not have cowered? may you not have cowered? may they not have cowered?
V-ing perfect
may I not have been cowering? may you not have been cowering? may he not have been cowering? may we not have been cowering? may you not have been cowering? may they not have been cowering?