English verb conjugation
COULD BIRTH

Regular verb: birth - birthed - birthed

Affirmation

Simple form	V-ing form
I could birth you could birth he could birth we could birth you could birth they could birth	I could be birthing you could be birthing he could be birthing we could be birthing you could be birthing they could be birthing
Perfect	V-ing perfect
I could have birthed you could have birthed he could have birthed we could have birthed you could have birthed they could have birthed	I could have been birthing you could have been birthing he could have been birthing we could have been birthing you could have been birthing they could have been birthing

Negation

Simple form	V-ing form
I couldn't birth you couldn't birth he couldn't birth we couldn't birth you couldn't birth they couldn't birth	I couldn't be birthing you couldn't be birthing he couldn't be birthing we couldn't be birthing you couldn't be birthing they couldn't be birthing
Perfect	V-ing perfect
I couldn't have birthed you couldn't have birthed he couldn't have birthed we couldn't have birthed you couldn't have birthed they couldn't have birthed	I couldn't have been birthing you couldn't have been birthing he couldn't have been birthing we couldn't have been birthing you couldn't have been birthing they couldn't have been birthing

Interrogative form

Simple form	V-ing form
could I birth? could you birth? could he birth? could we birth? could you birth? could they birth?	could I be birthing? could you be birthing? could he be birthing? could we be birthing? could you be birthing? could they be birthing?
Perfect	V-ing perfect
could I have birthed? could you have birthed? could he have birthed? could we have birthed? could you have birthed? could they have birthed?	could I have been birthing? could you have been birthing? could he have been birthing? could we have been birthing? could you have been birthing? could they have been birthing?

Interro-negative form

Simple form	V-ing form
couldn't I birth? couldn't you birth? couldn't he birth? couldn't we birth? couldn't you birth? couldn't they birth?	couldn't I be birthing? couldn't you be birthing? couldn't he be birthing? couldn't we be birthing? couldn't you be birthing? couldn't they be birthing?
Perfect	V-ing perfect
couldn't I have birthed? couldn't you have birthed? couldn't he have birthed? couldn't we have birthed? couldn't you have birthed? couldn't they have birthed?	couldn't I have been birthing? couldn't you have been birthing? couldn't he have been birthing? couldn't we have been birthing? couldn't you have been birthing? couldn't they have been birthing?