I must compete you must compete he must compete we must compete you must compete they must compete
V-ing form
I must be competing you must be competing he must be competing we must be competing you must be competing they must be competing
Perfect
I must have competed you must have competed he must have competed we must have competed you must have competed they must have competed
V-ing perfect
I must have been competing you must have been competing he must have been competing we must have been competing you must have been competing they must have been competing
Negation
Simple form
I must not compete you must not compete he must not compete we must not compete you must not compete they must not compete
V-ing form
I must not be competing you must not be competing he must not be competing we must not be competing you must not be competing they must not be competing
Perfect
I must not have competed you must not have competed he must not have competed we must not have competed you must not have competed they must not have competed
V-ing perfect
I must not have been competing you must not have been competing he must not have been competing we must not have been competing you must not have been competing they must not have been competing
Interrogative form
Simple form
must I compete? must you compete? must he compete? must we compete? must you compete? must they compete?
V-ing form
must I be competing? must you be competing? must he be competing? must we be competing? must you be competing? must they be competing?
Perfect
must I have competed? must you have competed? must he have competed? must we have competed? must you have competed? must they have competed?
V-ing perfect
must I have been competing? must you have been competing? must he have been competing? must we have been competing? must you have been competing? must they have been competing?
Interro-negative form
Simple form
must I not compete? must you not compete? must he not compete? must we not compete? must you not compete? must they not compete?
V-ing form
must I not be competing? must you not be competing? must he not be competing? must we not be competing? must you not be competing? must they not be competing?
Perfect
must I not have competed? must you not have competed? must he not have competed? must we not have competed? must you not have competed? must they not have competed?
V-ing perfect
must I not have been competing? must you not have been competing? must he not have been competing? must we not have been competing? must you not have been competing? must they not have been competing?