English verb conjugation
COULD HEADLINE

Regular verb: headline - headlined - headlined

Affirmation

Simple form	V-ing form
I could headline you could headline he could headline we could headline you could headline they could headline	I could be headlining you could be headlining he could be headlining we could be headlining you could be headlining they could be headlining
Perfect	V-ing perfect
I could have headlined you could have headlined he could have headlined we could have headlined you could have headlined they could have headlined	I could have been headlining you could have been headlining he could have been headlining we could have been headlining you could have been headlining they could have been headlining

Negation

Simple form	V-ing form
I could not headline you could not headline he could not headline we could not headline you could not headline they could not headline	I could not be headlining you could not be headlining he could not be headlining we could not be headlining you could not be headlining they could not be headlining
Perfect	V-ing perfect
I could not have headlined you could not have headlined he could not have headlined we could not have headlined you could not have headlined they could not have headlined	I could not have been headlining you could not have been headlining he could not have been headlining we could not have been headlining you could not have been headlining they could not have been headlining

Interrogative form

Simple form	V-ing form
could I headline? could you headline? could he headline? could we headline? could you headline? could they headline?	could I be headlining? could you be headlining? could he be headlining? could we be headlining? could you be headlining? could they be headlining?
Perfect	V-ing perfect
could I have headlined? could you have headlined? could he have headlined? could we have headlined? could you have headlined? could they have headlined?	could I have been headlining? could you have been headlining? could he have been headlining? could we have been headlining? could you have been headlining? could they have been headlining?

Interro-negative form

Simple form	V-ing form
could I not headline? could you not headline? could he not headline? could we not headline? could you not headline? could they not headline?	could I not be headlining? could you not be headlining? could he not be headlining? could we not be headlining? could you not be headlining? could they not be headlining?
Perfect	V-ing perfect
could I not have headlined? could you not have headlined? could he not have headlined? could we not have headlined? could you not have headlined? could they not have headlined?	could I not have been headlining? could you not have been headlining? could he not have been headlining? could we not have been headlining? could you not have been headlining? could they not have been headlining?