I must battle you must battle he must battle we must battle you must battle they must battle
V-ing form
I must be battling you must be battling he must be battling we must be battling you must be battling they must be battling
Perfect
I must have battled you must have battled he must have battled we must have battled you must have battled they must have battled
V-ing perfect
I must have been battling you must have been battling he must have been battling we must have been battling you must have been battling they must have been battling
Negation
Simple form
I must not battle you must not battle he must not battle we must not battle you must not battle they must not battle
V-ing form
I must not be battling you must not be battling he must not be battling we must not be battling you must not be battling they must not be battling
Perfect
I must not have battled you must not have battled he must not have battled we must not have battled you must not have battled they must not have battled
V-ing perfect
I must not have been battling you must not have been battling he must not have been battling we must not have been battling you must not have been battling they must not have been battling
Interrogative form
Simple form
must I battle? must you battle? must he battle? must we battle? must you battle? must they battle?
V-ing form
must I be battling? must you be battling? must he be battling? must we be battling? must you be battling? must they be battling?
Perfect
must I have battled? must you have battled? must he have battled? must we have battled? must you have battled? must they have battled?
V-ing perfect
must I have been battling? must you have been battling? must he have been battling? must we have been battling? must you have been battling? must they have been battling?
Interro-negative form
Simple form
must I not battle? must you not battle? must he not battle? must we not battle? must you not battle? must they not battle?
V-ing form
must I not be battling? must you not be battling? must he not be battling? must we not be battling? must you not be battling? must they not be battling?
Perfect
must I not have battled? must you not have battled? must he not have battled? must we not have battled? must you not have battled? must they not have battled?
V-ing perfect
must I not have been battling? must you not have been battling? must he not have been battling? must we not have been battling? must you not have been battling? must they not have been battling?