English verb conjugation
COULD HYPHEN

Regular verb: hyphen - hyphened - hyphened

Affirmation

Simple form	V-ing form
I could hyphen you could hyphen he could hyphen we could hyphen you could hyphen they could hyphen	I could be hyphening you could be hyphening he could be hyphening we could be hyphening you could be hyphening they could be hyphening
Perfect	V-ing perfect
I could have hyphened you could have hyphened he could have hyphened we could have hyphened you could have hyphened they could have hyphened	I could have been hyphening you could have been hyphening he could have been hyphening we could have been hyphening you could have been hyphening they could have been hyphening

Negation

Simple form	V-ing form
I could not hyphen you could not hyphen he could not hyphen we could not hyphen you could not hyphen they could not hyphen	I could not be hyphening you could not be hyphening he could not be hyphening we could not be hyphening you could not be hyphening they could not be hyphening
Perfect	V-ing perfect
I could not have hyphened you could not have hyphened he could not have hyphened we could not have hyphened you could not have hyphened they could not have hyphened	I could not have been hyphening you could not have been hyphening he could not have been hyphening we could not have been hyphening you could not have been hyphening they could not have been hyphening

Interrogative form

Simple form	V-ing form
could I hyphen? could you hyphen? could he hyphen? could we hyphen? could you hyphen? could they hyphen?	could I be hyphening? could you be hyphening? could he be hyphening? could we be hyphening? could you be hyphening? could they be hyphening?
Perfect	V-ing perfect
could I have hyphened? could you have hyphened? could he have hyphened? could we have hyphened? could you have hyphened? could they have hyphened?	could I have been hyphening? could you have been hyphening? could he have been hyphening? could we have been hyphening? could you have been hyphening? could they have been hyphening?

Interro-negative form

Simple form	V-ing form
could I not hyphen? could you not hyphen? could he not hyphen? could we not hyphen? could you not hyphen? could they not hyphen?	could I not be hyphening? could you not be hyphening? could he not be hyphening? could we not be hyphening? could you not be hyphening? could they not be hyphening?
Perfect	V-ing perfect
could I not have hyphened? could you not have hyphened? could he not have hyphened? could we not have hyphened? could you not have hyphened? could they not have hyphened?	could I not have been hyphening? could you not have been hyphening? could he not have been hyphening? could we not have been hyphening? could you not have been hyphening? could they not have been hyphening?