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 couldn't hyphen you couldn't hyphen he couldn't hyphen we couldn't hyphen you couldn't hyphen they couldn't hyphen	I couldn't be hyphening you couldn't be hyphening he couldn't be hyphening we couldn't be hyphening you couldn't be hyphening they couldn't be hyphening
Perfect	V-ing perfect
I couldn't have hyphened you couldn't have hyphened he couldn't have hyphened we couldn't have hyphened you couldn't have hyphened they couldn't have hyphened	I couldn't have been hyphening you couldn't have been hyphening he couldn't have been hyphening we couldn't have been hyphening you couldn't have been hyphening they couldn't 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
couldn't I hyphen? couldn't you hyphen? couldn't he hyphen? couldn't we hyphen? couldn't you hyphen? couldn't they hyphen?	couldn't I be hyphening? couldn't you be hyphening? couldn't he be hyphening? couldn't we be hyphening? couldn't you be hyphening? couldn't they be hyphening?
Perfect	V-ing perfect
couldn't I have hyphened? couldn't you have hyphened? couldn't he have hyphened? couldn't we have hyphened? couldn't you have hyphened? couldn't they have hyphened?	couldn't I have been hyphening? couldn't you have been hyphening? couldn't he have been hyphening? couldn't we have been hyphening? couldn't you have been hyphening? couldn't they have been hyphening?