English verb conjugation
COULD RUMBA

Regular verb: rumba - rumbaed - rumbaed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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