I must philosophize you must philosophize she must philosophize we must philosophize you must philosophize they must philosophize
V-ing form
I must be philosophizing you must be philosophizing she must be philosophizing we must be philosophizing you must be philosophizing they must be philosophizing
Perfect
I must have philosophized you must have philosophized she must have philosophized we must have philosophized you must have philosophized they must have philosophized
V-ing perfect
I must have been philosophizing you must have been philosophizing she must have been philosophizing we must have been philosophizing you must have been philosophizing they must have been philosophizing
Negation
Simple form
I must not philosophize you must not philosophize she must not philosophize we must not philosophize you must not philosophize they must not philosophize
V-ing form
I must not be philosophizing you must not be philosophizing she must not be philosophizing we must not be philosophizing you must not be philosophizing they must not be philosophizing
Perfect
I must not have philosophized you must not have philosophized she must not have philosophized we must not have philosophized you must not have philosophized they must not have philosophized
V-ing perfect
I must not have been philosophizing you must not have been philosophizing she must not have been philosophizing we must not have been philosophizing you must not have been philosophizing they must not have been philosophizing
Interrogative form
Simple form
must I philosophize? must you philosophize? must she philosophize? must we philosophize? must you philosophize? must they philosophize?
V-ing form
must I be philosophizing? must you be philosophizing? must she be philosophizing? must we be philosophizing? must you be philosophizing? must they be philosophizing?
Perfect
must I have philosophized? must you have philosophized? must she have philosophized? must we have philosophized? must you have philosophized? must they have philosophized?
V-ing perfect
must I have been philosophizing? must you have been philosophizing? must she have been philosophizing? must we have been philosophizing? must you have been philosophizing? must they have been philosophizing?
Interro-negative form
Simple form
must I not philosophize? must you not philosophize? must she not philosophize? must we not philosophize? must you not philosophize? must they not philosophize?
V-ing form
must I not be philosophizing? must you not be philosophizing? must she not be philosophizing? must we not be philosophizing? must you not be philosophizing? must they not be philosophizing?
Perfect
must I not have philosophized? must you not have philosophized? must she not have philosophized? must we not have philosophized? must you not have philosophized? must they not have philosophized?
V-ing perfect
must I not have been philosophizing? must you not have been philosophizing? must she not have been philosophizing? must we not have been philosophizing? must you not have been philosophizing? must they not have been philosophizing?