English verb conjugation
COULD BARB

Regular verb: barb - barbed - barbed

Affirmation

Simple form	V-ing form
I could barb you could barb she could barb we could barb you could barb they could barb	I could be barbing you could be barbing she could be barbing we could be barbing you could be barbing they could be barbing
Perfect	V-ing perfect
I could have barbed you could have barbed she could have barbed we could have barbed you could have barbed they could have barbed	I could have been barbing you could have been barbing she could have been barbing we could have been barbing you could have been barbing they could have been barbing

Negation

Simple form	V-ing form
I couldn't barb you couldn't barb she couldn't barb we couldn't barb you couldn't barb they couldn't barb	I couldn't be barbing you couldn't be barbing she couldn't be barbing we couldn't be barbing you couldn't be barbing they couldn't be barbing
Perfect	V-ing perfect
I couldn't have barbed you couldn't have barbed she couldn't have barbed we couldn't have barbed you couldn't have barbed they couldn't have barbed	I couldn't have been barbing you couldn't have been barbing she couldn't have been barbing we couldn't have been barbing you couldn't have been barbing they couldn't have been barbing

Interrogative form

Simple form	V-ing form
could I barb? could you barb? could she barb? could we barb? could you barb? could they barb?	could I be barbing? could you be barbing? could she be barbing? could we be barbing? could you be barbing? could they be barbing?
Perfect	V-ing perfect
could I have barbed? could you have barbed? could she have barbed? could we have barbed? could you have barbed? could they have barbed?	could I have been barbing? could you have been barbing? could she have been barbing? could we have been barbing? could you have been barbing? could they have been barbing?

Interro-negative form

Simple form	V-ing form
couldn't I barb? couldn't you barb? couldn't she barb? couldn't we barb? couldn't you barb? couldn't they barb?	couldn't I be barbing? couldn't you be barbing? couldn't she be barbing? couldn't we be barbing? couldn't you be barbing? couldn't they be barbing?
Perfect	V-ing perfect
couldn't I have barbed? couldn't you have barbed? couldn't she have barbed? couldn't we have barbed? couldn't you have barbed? couldn't they have barbed?	couldn't I have been barbing? couldn't you have been barbing? couldn't she have been barbing? couldn't we have been barbing? couldn't you have been barbing? couldn't they have been barbing?