I must abort you must abort he must abort we must abort you must abort they must abort
V-ing form
I must be aborting you must be aborting he must be aborting we must be aborting you must be aborting they must be aborting
Perfect
I must have aborted you must have aborted he must have aborted we must have aborted you must have aborted they must have aborted
V-ing perfect
I must have been aborting you must have been aborting he must have been aborting we must have been aborting you must have been aborting they must have been aborting
Negation
Simple form
I must not abort you must not abort he must not abort we must not abort you must not abort they must not abort
V-ing form
I must not be aborting you must not be aborting he must not be aborting we must not be aborting you must not be aborting they must not be aborting
Perfect
I must not have aborted you must not have aborted he must not have aborted we must not have aborted you must not have aborted they must not have aborted
V-ing perfect
I must not have been aborting you must not have been aborting he must not have been aborting we must not have been aborting you must not have been aborting they must not have been aborting
Interrogative form
Simple form
must I abort? must you abort? must he abort? must we abort? must you abort? must they abort?
V-ing form
must I be aborting? must you be aborting? must he be aborting? must we be aborting? must you be aborting? must they be aborting?
Perfect
must I have aborted? must you have aborted? must he have aborted? must we have aborted? must you have aborted? must they have aborted?
V-ing perfect
must I have been aborting? must you have been aborting? must he have been aborting? must we have been aborting? must you have been aborting? must they have been aborting?
Interro-negative form
Simple form
must I not abort? must you not abort? must he not abort? must we not abort? must you not abort? must they not abort?
V-ing form
must I not be aborting? must you not be aborting? must he not be aborting? must we not be aborting? must you not be aborting? must they not be aborting?
Perfect
must I not have aborted? must you not have aborted? must he not have aborted? must we not have aborted? must you not have aborted? must they not have aborted?
V-ing perfect
must I not have been aborting? must you not have been aborting? must he not have been aborting? must we not have been aborting? must you not have been aborting? must they not have been aborting?