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 couldn't headline you couldn't headline he couldn't headline we couldn't headline you couldn't headline they couldn't headline	I couldn't be headlining you couldn't be headlining he couldn't be headlining we couldn't be headlining you couldn't be headlining they couldn't be headlining
Perfect	V-ing perfect
I couldn't have headlined you couldn't have headlined he couldn't have headlined we couldn't have headlined you couldn't have headlined they couldn't have headlined	I couldn't have been headlining you couldn't have been headlining he couldn't have been headlining we couldn't have been headlining you couldn't have been headlining they couldn't 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
couldn't I headline? couldn't you headline? couldn't he headline? couldn't we headline? couldn't you headline? couldn't they headline?	couldn't I be headlining? couldn't you be headlining? couldn't he be headlining? couldn't we be headlining? couldn't you be headlining? couldn't they be headlining?
Perfect	V-ing perfect
couldn't I have headlined? couldn't you have headlined? couldn't he have headlined? couldn't we have headlined? couldn't you have headlined? couldn't they have headlined?	couldn't I have been headlining? couldn't you have been headlining? couldn't he have been headlining? couldn't we have been headlining? couldn't you have been headlining? couldn't they have been headlining?