English verb conjugation
MUST HUMBUG

Regular verb: humbug - humbugged - humbugged

Affirmation

Simple form	V-ing form
I must humbug you must humbug she must humbug we must humbug you must humbug they must humbug	I must be humbugging you must be humbugging she must be humbugging we must be humbugging you must be humbugging they must be humbugging
Perfect	V-ing perfect
I must have humbugged you must have humbugged she must have humbugged we must have humbugged you must have humbugged they must have humbugged	I must have been humbugging you must have been humbugging she must have been humbugging we must have been humbugging you must have been humbugging they must have been humbugging

Negation

Simple form	V-ing form
I must not humbug you must not humbug she must not humbug we must not humbug you must not humbug they must not humbug	I must not be humbugging you must not be humbugging she must not be humbugging we must not be humbugging you must not be humbugging they must not be humbugging
Perfect	V-ing perfect
I must not have humbugged you must not have humbugged she must not have humbugged we must not have humbugged you must not have humbugged they must not have humbugged	I must not have been humbugging you must not have been humbugging she must not have been humbugging we must not have been humbugging you must not have been humbugging they must not have been humbugging

Interrogative form

Simple form	V-ing form
must I humbug? must you humbug? must she humbug? must we humbug? must you humbug? must they humbug?	must I be humbugging? must you be humbugging? must she be humbugging? must we be humbugging? must you be humbugging? must they be humbugging?
Perfect	V-ing perfect
must I have humbugged? must you have humbugged? must she have humbugged? must we have humbugged? must you have humbugged? must they have humbugged?	must I have been humbugging? must you have been humbugging? must she have been humbugging? must we have been humbugging? must you have been humbugging? must they have been humbugging?

Interro-negative form

Simple form	V-ing form
must I not humbug? must you not humbug? must she not humbug? must we not humbug? must you not humbug? must they not humbug?	must I not be humbugging? must you not be humbugging? must she not be humbugging? must we not be humbugging? must you not be humbugging? must they not be humbugging?
Perfect	V-ing perfect
must I not have humbugged? must you not have humbugged? must she not have humbugged? must we not have humbugged? must you not have humbugged? must they not have humbugged?	must I not have been humbugging? must you not have been humbugging? must she not have been humbugging? must we not have been humbugging? must you not have been humbugging? must they not have been humbugging?