English verb conjugation
COULD OUTPUT

Irregular verb: output - output - output

Affirmation

Simple form	V-ing form
I could output you could output he could output we could output you could output they could output	I could be outputing you could be outputing he could be outputing we could be outputing you could be outputing they could be outputing
Perfect	V-ing perfect
I could have output you could have output he could have output we could have output you could have output they could have output	I could have been outputing you could have been outputing he could have been outputing we could have been outputing you could have been outputing they could have been outputing

Negation

Simple form	V-ing form
I could not output you could not output he could not output we could not output you could not output they could not output	I could not be outputing you could not be outputing he could not be outputing we could not be outputing you could not be outputing they could not be outputing
Perfect	V-ing perfect
I could not have output you could not have output he could not have output we could not have output you could not have output they could not have output	I could not have been outputing you could not have been outputing he could not have been outputing we could not have been outputing you could not have been outputing they could not have been outputing

Interrogative form

Simple form	V-ing form
could I output? could you output? could he output? could we output? could you output? could they output?	could I be outputing? could you be outputing? could he be outputing? could we be outputing? could you be outputing? could they be outputing?
Perfect	V-ing perfect
could I have output? could you have output? could he have output? could we have output? could you have output? could they have output?	could I have been outputing? could you have been outputing? could he have been outputing? could we have been outputing? could you have been outputing? could they have been outputing?

Interro-negative form

Simple form	V-ing form
could I not output? could you not output? could he not output? could we not output? could you not output? could they not output?	could I not be outputing? could you not be outputing? could he not be outputing? could we not be outputing? could you not be outputing? could they not be outputing?
Perfect	V-ing perfect
could I not have output? could you not have output? could he not have output? could we not have output? could you not have output? could they not have output?	could I not have been outputing? could you not have been outputing? could he not have been outputing? could we not have been outputing? could you not have been outputing? could they not have been outputing?