I must headquarter you must headquarter she must headquarter we must headquarter you must headquarter they must headquarter
V-ing form
I must be headquartering you must be headquartering she must be headquartering we must be headquartering you must be headquartering they must be headquartering
Perfect
I must have headquartered you must have headquartered she must have headquartered we must have headquartered you must have headquartered they must have headquartered
V-ing perfect
I must have been headquartering you must have been headquartering she must have been headquartering we must have been headquartering you must have been headquartering they must have been headquartering
Negation
Simple form
I must not headquarter you must not headquarter she must not headquarter we must not headquarter you must not headquarter they must not headquarter
V-ing form
I must not be headquartering you must not be headquartering she must not be headquartering we must not be headquartering you must not be headquartering they must not be headquartering
Perfect
I must not have headquartered you must not have headquartered she must not have headquartered we must not have headquartered you must not have headquartered they must not have headquartered
V-ing perfect
I must not have been headquartering you must not have been headquartering she must not have been headquartering we must not have been headquartering you must not have been headquartering they must not have been headquartering
Interrogative form
Simple form
must I headquarter? must you headquarter? must she headquarter? must we headquarter? must you headquarter? must they headquarter?
V-ing form
must I be headquartering? must you be headquartering? must she be headquartering? must we be headquartering? must you be headquartering? must they be headquartering?
Perfect
must I have headquartered? must you have headquartered? must she have headquartered? must we have headquartered? must you have headquartered? must they have headquartered?
V-ing perfect
must I have been headquartering? must you have been headquartering? must she have been headquartering? must we have been headquartering? must you have been headquartering? must they have been headquartering?
Interro-negative form
Simple form
must I not headquarter? must you not headquarter? must she not headquarter? must we not headquarter? must you not headquarter? must they not headquarter?
V-ing form
must I not be headquartering? must you not be headquartering? must she not be headquartering? must we not be headquartering? must you not be headquartering? must they not be headquartering?
Perfect
must I not have headquartered? must you not have headquartered? must she not have headquartered? must we not have headquartered? must you not have headquartered? must they not have headquartered?
V-ing perfect
must I not have been headquartering? must you not have been headquartering? must she not have been headquartering? must we not have been headquartering? must you not have been headquartering? must they not have been headquartering?