English verb conjugation
MUST BEHAVE

Regular verb: behave - behaved - behaved

Affirmation

Simple form	V-ing form
I must behave you must behave he must behave we must behave you must behave they must behave	I must be behaving you must be behaving he must be behaving we must be behaving you must be behaving they must be behaving
Perfect	V-ing perfect
I must have behaved you must have behaved he must have behaved we must have behaved you must have behaved they must have behaved	I must have been behaving you must have been behaving he must have been behaving we must have been behaving you must have been behaving they must have been behaving

Negation

Simple form	V-ing form
I must not behave you must not behave he must not behave we must not behave you must not behave they must not behave	I must not be behaving you must not be behaving he must not be behaving we must not be behaving you must not be behaving they must not be behaving
Perfect	V-ing perfect
I must not have behaved you must not have behaved he must not have behaved we must not have behaved you must not have behaved they must not have behaved	I must not have been behaving you must not have been behaving he must not have been behaving we must not have been behaving you must not have been behaving they must not have been behaving

Interrogative form

Simple form	V-ing form
must I behave? must you behave? must he behave? must we behave? must you behave? must they behave?	must I be behaving? must you be behaving? must he be behaving? must we be behaving? must you be behaving? must they be behaving?
Perfect	V-ing perfect
must I have behaved? must you have behaved? must he have behaved? must we have behaved? must you have behaved? must they have behaved?	must I have been behaving? must you have been behaving? must he have been behaving? must we have been behaving? must you have been behaving? must they have been behaving?

Interro-negative form

Simple form	V-ing form
must I not behave? must you not behave? must he not behave? must we not behave? must you not behave? must they not behave?	must I not be behaving? must you not be behaving? must he not be behaving? must we not be behaving? must you not be behaving? must they not be behaving?
Perfect	V-ing perfect
must I not have behaved? must you not have behaved? must he not have behaved? must we not have behaved? must you not have behaved? must they not have behaved?	must I not have been behaving? must you not have been behaving? must he not have been behaving? must we not have been behaving? must you not have been behaving? must they not have been behaving?