I must tape-record you must tape-record he must tape-record we must tape-record you must tape-record they must tape-record
V-ing form
I must be tape-recording you must be tape-recording he must be tape-recording we must be tape-recording you must be tape-recording they must be tape-recording
Perfect
I must have tape-recorded you must have tape-recorded he must have tape-recorded we must have tape-recorded you must have tape-recorded they must have tape-recorded
V-ing perfect
I must have been tape-recording you must have been tape-recording he must have been tape-recording we must have been tape-recording you must have been tape-recording they must have been tape-recording
Negation
Simple form
I must not tape-record you must not tape-record he must not tape-record we must not tape-record you must not tape-record they must not tape-record
V-ing form
I must not be tape-recording you must not be tape-recording he must not be tape-recording we must not be tape-recording you must not be tape-recording they must not be tape-recording
Perfect
I must not have tape-recorded you must not have tape-recorded he must not have tape-recorded we must not have tape-recorded you must not have tape-recorded they must not have tape-recorded
V-ing perfect
I must not have been tape-recording you must not have been tape-recording he must not have been tape-recording we must not have been tape-recording you must not have been tape-recording they must not have been tape-recording
Interrogative form
Simple form
must I tape-record? must you tape-record? must he tape-record? must we tape-record? must you tape-record? must they tape-record?
V-ing form
must I be tape-recording? must you be tape-recording? must he be tape-recording? must we be tape-recording? must you be tape-recording? must they be tape-recording?
Perfect
must I have tape-recorded? must you have tape-recorded? must he have tape-recorded? must we have tape-recorded? must you have tape-recorded? must they have tape-recorded?
V-ing perfect
must I have been tape-recording? must you have been tape-recording? must he have been tape-recording? must we have been tape-recording? must you have been tape-recording? must they have been tape-recording?
Interro-negative form
Simple form
must I not tape-record? must you not tape-record? must he not tape-record? must we not tape-record? must you not tape-record? must they not tape-record?
V-ing form
must I not be tape-recording? must you not be tape-recording? must he not be tape-recording? must we not be tape-recording? must you not be tape-recording? must they not be tape-recording?
Perfect
must I not have tape-recorded? must you not have tape-recorded? must he not have tape-recorded? must we not have tape-recorded? must you not have tape-recorded? must they not have tape-recorded?
V-ing perfect
must I not have been tape-recording? must you not have been tape-recording? must he not have been tape-recording? must we not have been tape-recording? must you not have been tape-recording? must they not have been tape-recording?