I must intrude you must intrude she must intrude we must intrude you must intrude they must intrude
V-ing form
I must be intruding you must be intruding she must be intruding we must be intruding you must be intruding they must be intruding
Perfect
I must have intruded you must have intruded she must have intruded we must have intruded you must have intruded they must have intruded
V-ing perfect
I must have been intruding you must have been intruding she must have been intruding we must have been intruding you must have been intruding they must have been intruding
Negation
Simple form
I must not intrude you must not intrude she must not intrude we must not intrude you must not intrude they must not intrude
V-ing form
I must not be intruding you must not be intruding she must not be intruding we must not be intruding you must not be intruding they must not be intruding
Perfect
I must not have intruded you must not have intruded she must not have intruded we must not have intruded you must not have intruded they must not have intruded
V-ing perfect
I must not have been intruding you must not have been intruding she must not have been intruding we must not have been intruding you must not have been intruding they must not have been intruding
Interrogative form
Simple form
must I intrude? must you intrude? must she intrude? must we intrude? must you intrude? must they intrude?
V-ing form
must I be intruding? must you be intruding? must she be intruding? must we be intruding? must you be intruding? must they be intruding?
Perfect
must I have intruded? must you have intruded? must she have intruded? must we have intruded? must you have intruded? must they have intruded?
V-ing perfect
must I have been intruding? must you have been intruding? must she have been intruding? must we have been intruding? must you have been intruding? must they have been intruding?
Interro-negative form
Simple form
must I not intrude? must you not intrude? must she not intrude? must we not intrude? must you not intrude? must they not intrude?
V-ing form
must I not be intruding? must you not be intruding? must she not be intruding? must we not be intruding? must you not be intruding? must they not be intruding?
Perfect
must I not have intruded? must you not have intruded? must she not have intruded? must we not have intruded? must you not have intruded? must they not have intruded?
V-ing perfect
must I not have been intruding? must you not have been intruding? must she not have been intruding? must we not have been intruding? must you not have been intruding? must they not have been intruding?