English verb conjugation
MUST RUMBA

Regular verb: rumba - rumbaed - rumbaed

Affirmation

Simple form	V-ing form
I must rumba you must rumba he must rumba we must rumba you must rumba they must rumba	I must be rumbaing you must be rumbaing he must be rumbaing we must be rumbaing you must be rumbaing they must be rumbaing
Perfect	V-ing perfect
I must have rumbaed you must have rumbaed he must have rumbaed we must have rumbaed you must have rumbaed they must have rumbaed	I must have been rumbaing you must have been rumbaing he must have been rumbaing we must have been rumbaing you must have been rumbaing they must have been rumbaing

Negation

Simple form	V-ing form
I mustn't rumba you mustn't rumba he mustn't rumba we mustn't rumba you mustn't rumba they mustn't rumba	I mustn't be rumbaing you mustn't be rumbaing he mustn't be rumbaing we mustn't be rumbaing you mustn't be rumbaing they mustn't be rumbaing
Perfect	V-ing perfect
I mustn't have rumbaed you mustn't have rumbaed he mustn't have rumbaed we mustn't have rumbaed you mustn't have rumbaed they mustn't have rumbaed	I mustn't have been rumbaing you mustn't have been rumbaing he mustn't have been rumbaing we mustn't have been rumbaing you mustn't have been rumbaing they mustn't have been rumbaing

Interrogative form

Simple form	V-ing form
must I rumba? must you rumba? must he rumba? must we rumba? must you rumba? must they rumba?	must I be rumbaing? must you be rumbaing? must he be rumbaing? must we be rumbaing? must you be rumbaing? must they be rumbaing?
Perfect	V-ing perfect
must I have rumbaed? must you have rumbaed? must he have rumbaed? must we have rumbaed? must you have rumbaed? must they have rumbaed?	must I have been rumbaing? must you have been rumbaing? must he have been rumbaing? must we have been rumbaing? must you have been rumbaing? must they have been rumbaing?

Interro-negative form

Simple form	V-ing form
mustn't I rumba? mustn't you rumba? mustn't he rumba? mustn't we rumba? mustn't you rumba? mustn't they rumba?	mustn't I be rumbaing? mustn't you be rumbaing? mustn't he be rumbaing? mustn't we be rumbaing? mustn't you be rumbaing? mustn't they be rumbaing?
Perfect	V-ing perfect
mustn't I have rumbaed? mustn't you have rumbaed? mustn't he have rumbaed? mustn't we have rumbaed? mustn't you have rumbaed? mustn't they have rumbaed?	mustn't I have been rumbaing? mustn't you have been rumbaing? mustn't he have been rumbaing? mustn't we have been rumbaing? mustn't you have been rumbaing? mustn't they have been rumbaing?