English verb conjugation
COULD DISCO

Regular verb: disco - discoed - discoed

Affirmation

Simple form	V-ing form
I could disco you could disco he could disco we could disco you could disco they could disco	I could be discoing you could be discoing he could be discoing we could be discoing you could be discoing they could be discoing
Perfect	V-ing perfect
I could have discoed you could have discoed he could have discoed we could have discoed you could have discoed they could have discoed	I could have been discoing you could have been discoing he could have been discoing we could have been discoing you could have been discoing they could have been discoing

Negation

Simple form	V-ing form
I couldn't disco you couldn't disco he couldn't disco we couldn't disco you couldn't disco they couldn't disco	I couldn't be discoing you couldn't be discoing he couldn't be discoing we couldn't be discoing you couldn't be discoing they couldn't be discoing
Perfect	V-ing perfect
I couldn't have discoed you couldn't have discoed he couldn't have discoed we couldn't have discoed you couldn't have discoed they couldn't have discoed	I couldn't have been discoing you couldn't have been discoing he couldn't have been discoing we couldn't have been discoing you couldn't have been discoing they couldn't have been discoing

Interrogative form

Simple form	V-ing form
could I disco? could you disco? could he disco? could we disco? could you disco? could they disco?	could I be discoing? could you be discoing? could he be discoing? could we be discoing? could you be discoing? could they be discoing?
Perfect	V-ing perfect
could I have discoed? could you have discoed? could he have discoed? could we have discoed? could you have discoed? could they have discoed?	could I have been discoing? could you have been discoing? could he have been discoing? could we have been discoing? could you have been discoing? could they have been discoing?

Interro-negative form

Simple form	V-ing form
couldn't I disco? couldn't you disco? couldn't he disco? couldn't we disco? couldn't you disco? couldn't they disco?	couldn't I be discoing? couldn't you be discoing? couldn't he be discoing? couldn't we be discoing? couldn't you be discoing? couldn't they be discoing?
Perfect	V-ing perfect
couldn't I have discoed? couldn't you have discoed? couldn't he have discoed? couldn't we have discoed? couldn't you have discoed? couldn't they have discoed?	couldn't I have been discoing? couldn't you have been discoing? couldn't he have been discoing? couldn't we have been discoing? couldn't you have been discoing? couldn't they have been discoing?