English verb conjugation
MUST HUMBUG

Regular verb: humbug - humbugged - humbugged

Affirmation

Simple form	V-ing form
I must humbug you must humbug he must humbug we must humbug you must humbug they must humbug	I must be humbugging you must be humbugging he 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 he 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 he 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 mustn't humbug you mustn't humbug he mustn't humbug we mustn't humbug you mustn't humbug they mustn't humbug	I mustn't be humbugging you mustn't be humbugging he mustn't be humbugging we mustn't be humbugging you mustn't be humbugging they mustn't be humbugging
Perfect	V-ing perfect
I mustn't have humbugged you mustn't have humbugged he mustn't have humbugged we mustn't have humbugged you mustn't have humbugged they mustn't have humbugged	I mustn't have been humbugging you mustn't have been humbugging he mustn't have been humbugging we mustn't have been humbugging you mustn't have been humbugging they mustn't have been humbugging

Interrogative form

Simple form	V-ing form
must I humbug? must you humbug? must he humbug? must we humbug? must you humbug? must they humbug?	must I be humbugging? must you be humbugging? must he 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 he 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 he 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
mustn't I humbug? mustn't you humbug? mustn't he humbug? mustn't we humbug? mustn't you humbug? mustn't they humbug?	mustn't I be humbugging? mustn't you be humbugging? mustn't he be humbugging? mustn't we be humbugging? mustn't you be humbugging? mustn't they be humbugging?
Perfect	V-ing perfect
mustn't I have humbugged? mustn't you have humbugged? mustn't he have humbugged? mustn't we have humbugged? mustn't you have humbugged? mustn't they have humbugged?	mustn't I have been humbugging? mustn't you have been humbugging? mustn't he have been humbugging? mustn't we have been humbugging? mustn't you have been humbugging? mustn't they have been humbugging?