I may quiver you may quiver she may quiver we may quiver you may quiver they may quiver
V-ing form
I may be quivering you may be quivering she may be quivering we may be quivering you may be quivering they may be quivering
Perfect
I may have quivered you may have quivered she may have quivered we may have quivered you may have quivered they may have quivered
V-ing perfect
I may have been quivering you may have been quivering she may have been quivering we may have been quivering you may have been quivering they may have been quivering
Negation
Simple form
I may not quiver you may not quiver she may not quiver we may not quiver you may not quiver they may not quiver
V-ing form
I may not be quivering you may not be quivering she may not be quivering we may not be quivering you may not be quivering they may not be quivering
Perfect
I may not have quivered you may not have quivered she may not have quivered we may not have quivered you may not have quivered they may not have quivered
V-ing perfect
I may not have been quivering you may not have been quivering she may not have been quivering we may not have been quivering you may not have been quivering they may not have been quivering
Interrogative form
Simple form
may I quiver? may you quiver? may she quiver? may we quiver? may you quiver? may they quiver?
V-ing form
may I be quivering? may you be quivering? may she be quivering? may we be quivering? may you be quivering? may they be quivering?
Perfect
may I have quivered? may you have quivered? may she have quivered? may we have quivered? may you have quivered? may they have quivered?
V-ing perfect
may I have been quivering? may you have been quivering? may she have been quivering? may we have been quivering? may you have been quivering? may they have been quivering?
Interro-negative form
Simple form
may I not quiver? may you not quiver? may she not quiver? may we not quiver? may you not quiver? may they not quiver?
V-ing form
may I not be quivering? may you not be quivering? may she not be quivering? may we not be quivering? may you not be quivering? may they not be quivering?
Perfect
may I not have quivered? may you not have quivered? may she not have quivered? may we not have quivered? may you not have quivered? may they not have quivered?
V-ing perfect
may I not have been quivering? may you not have been quivering? may she not have been quivering? may we not have been quivering? may you not have been quivering? may they not have been quivering?