English verb conjugation
MUST BUG

Regular verb: bug - bugged - bugged

Affirmation

Simple form	V-ing form
I must bug you must bug she must bug we must bug you must bug they must bug	I must be bugging you must be bugging she must be bugging we must be bugging you must be bugging they must be bugging
Perfect	V-ing perfect
I must have bugged you must have bugged she must have bugged we must have bugged you must have bugged they must have bugged	I must have been bugging you must have been bugging she must have been bugging we must have been bugging you must have been bugging they must have been bugging

Negation

Simple form	V-ing form
I must not bug you must not bug she must not bug we must not bug you must not bug they must not bug	I must not be bugging you must not be bugging she must not be bugging we must not be bugging you must not be bugging they must not be bugging
Perfect	V-ing perfect
I must not have bugged you must not have bugged she must not have bugged we must not have bugged you must not have bugged they must not have bugged	I must not have been bugging you must not have been bugging she must not have been bugging we must not have been bugging you must not have been bugging they must not have been bugging

Interrogative form

Simple form	V-ing form
must I bug? must you bug? must she bug? must we bug? must you bug? must they bug?	must I be bugging? must you be bugging? must she be bugging? must we be bugging? must you be bugging? must they be bugging?
Perfect	V-ing perfect
must I have bugged? must you have bugged? must she have bugged? must we have bugged? must you have bugged? must they have bugged?	must I have been bugging? must you have been bugging? must she have been bugging? must we have been bugging? must you have been bugging? must they have been bugging?

Interro-negative form

Simple form	V-ing form
must I not bug? must you not bug? must she not bug? must we not bug? must you not bug? must they not bug?	must I not be bugging? must you not be bugging? must she not be bugging? must we not be bugging? must you not be bugging? must they not be bugging?
Perfect	V-ing perfect
must I not have bugged? must you not have bugged? must she not have bugged? must we not have bugged? must you not have bugged? must they not have bugged?	must I not have been bugging? must you not have been bugging? must she not have been bugging? must we not have been bugging? must you not have been bugging? must they not have been bugging?