I must uncover you must uncover he must uncover we must uncover you must uncover they must uncover
V-ing form
I must be uncovering you must be uncovering he must be uncovering we must be uncovering you must be uncovering they must be uncovering
Perfect
I must have uncovered you must have uncovered he must have uncovered we must have uncovered you must have uncovered they must have uncovered
V-ing perfect
I must have been uncovering you must have been uncovering he must have been uncovering we must have been uncovering you must have been uncovering they must have been uncovering
Negation
Simple form
I must not uncover you must not uncover he must not uncover we must not uncover you must not uncover they must not uncover
V-ing form
I must not be uncovering you must not be uncovering he must not be uncovering we must not be uncovering you must not be uncovering they must not be uncovering
Perfect
I must not have uncovered you must not have uncovered he must not have uncovered we must not have uncovered you must not have uncovered they must not have uncovered
V-ing perfect
I must not have been uncovering you must not have been uncovering he must not have been uncovering we must not have been uncovering you must not have been uncovering they must not have been uncovering
Interrogative form
Simple form
must I uncover? must you uncover? must he uncover? must we uncover? must you uncover? must they uncover?
V-ing form
must I be uncovering? must you be uncovering? must he be uncovering? must we be uncovering? must you be uncovering? must they be uncovering?
Perfect
must I have uncovered? must you have uncovered? must he have uncovered? must we have uncovered? must you have uncovered? must they have uncovered?
V-ing perfect
must I have been uncovering? must you have been uncovering? must he have been uncovering? must we have been uncovering? must you have been uncovering? must they have been uncovering?
Interro-negative form
Simple form
must I not uncover? must you not uncover? must he not uncover? must we not uncover? must you not uncover? must they not uncover?
V-ing form
must I not be uncovering? must you not be uncovering? must he not be uncovering? must we not be uncovering? must you not be uncovering? must they not be uncovering?
Perfect
must I not have uncovered? must you not have uncovered? must he not have uncovered? must we not have uncovered? must you not have uncovered? must they not have uncovered?
V-ing perfect
must I not have been uncovering? must you not have been uncovering? must he not have been uncovering? must we not have been uncovering? must you not have been uncovering? must they not have been uncovering?