English verb conjugation
COULD JAZZ

Regular verb: jazz - jazzed - jazzed

Affirmation

Simple form	V-ing form
I could jazz you could jazz he could jazz we could jazz you could jazz they could jazz	I could be jazzing you could be jazzing he could be jazzing we could be jazzing you could be jazzing they could be jazzing
Perfect	V-ing perfect
I could have jazzed you could have jazzed he could have jazzed we could have jazzed you could have jazzed they could have jazzed	I could have been jazzing you could have been jazzing he could have been jazzing we could have been jazzing you could have been jazzing they could have been jazzing

Negation

Simple form	V-ing form
I couldn't jazz you couldn't jazz he couldn't jazz we couldn't jazz you couldn't jazz they couldn't jazz	I couldn't be jazzing you couldn't be jazzing he couldn't be jazzing we couldn't be jazzing you couldn't be jazzing they couldn't be jazzing
Perfect	V-ing perfect
I couldn't have jazzed you couldn't have jazzed he couldn't have jazzed we couldn't have jazzed you couldn't have jazzed they couldn't have jazzed	I couldn't have been jazzing you couldn't have been jazzing he couldn't have been jazzing we couldn't have been jazzing you couldn't have been jazzing they couldn't have been jazzing

Interrogative form

Simple form	V-ing form
could I jazz? could you jazz? could he jazz? could we jazz? could you jazz? could they jazz?	could I be jazzing? could you be jazzing? could he be jazzing? could we be jazzing? could you be jazzing? could they be jazzing?
Perfect	V-ing perfect
could I have jazzed? could you have jazzed? could he have jazzed? could we have jazzed? could you have jazzed? could they have jazzed?	could I have been jazzing? could you have been jazzing? could he have been jazzing? could we have been jazzing? could you have been jazzing? could they have been jazzing?

Interro-negative form

Simple form	V-ing form
couldn't I jazz? couldn't you jazz? couldn't he jazz? couldn't we jazz? couldn't you jazz? couldn't they jazz?	couldn't I be jazzing? couldn't you be jazzing? couldn't he be jazzing? couldn't we be jazzing? couldn't you be jazzing? couldn't they be jazzing?
Perfect	V-ing perfect
couldn't I have jazzed? couldn't you have jazzed? couldn't he have jazzed? couldn't we have jazzed? couldn't you have jazzed? couldn't they have jazzed?	couldn't I have been jazzing? couldn't you have been jazzing? couldn't he have been jazzing? couldn't we have been jazzing? couldn't you have been jazzing? couldn't they have been jazzing?