English verb conjugation
MUST RUMBA

Regular verb: rumba - rumbaed - rumbaed

Affirmation

Simple form	V-ing form
I must rumba you must rumba she must rumba we must rumba you must rumba they must rumba	I must be rumbaing you must be rumbaing she 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 she 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 she 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 she 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 she 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 she 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 she 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 she rumba? must we rumba? must you rumba? must they rumba?	must I be rumbaing? must you be rumbaing? must she 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 she 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 she 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 she 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 she 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 she 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 she have been rumbaing? mustn't we have been rumbaing? mustn't you have been rumbaing? mustn't they have been rumbaing?