English verb conjugation
COULD PHONE

Regular verb: phone - phoned - phoned

Affirmation

Simple form	V-ing form
I could phone you could phone he could phone we could phone you could phone they could phone	I could be phoning you could be phoning he could be phoning we could be phoning you could be phoning they could be phoning
Perfect	V-ing perfect
I could have phoned you could have phoned he could have phoned we could have phoned you could have phoned they could have phoned	I could have been phoning you could have been phoning he could have been phoning we could have been phoning you could have been phoning they could have been phoning

Negation

Simple form	V-ing form
I could not phone you could not phone he could not phone we could not phone you could not phone they could not phone	I could not be phoning you could not be phoning he could not be phoning we could not be phoning you could not be phoning they could not be phoning
Perfect	V-ing perfect
I could not have phoned you could not have phoned he could not have phoned we could not have phoned you could not have phoned they could not have phoned	I could not have been phoning you could not have been phoning he could not have been phoning we could not have been phoning you could not have been phoning they could not have been phoning

Interrogative form

Simple form	V-ing form
could I phone? could you phone? could he phone? could we phone? could you phone? could they phone?	could I be phoning? could you be phoning? could he be phoning? could we be phoning? could you be phoning? could they be phoning?
Perfect	V-ing perfect
could I have phoned? could you have phoned? could he have phoned? could we have phoned? could you have phoned? could they have phoned?	could I have been phoning? could you have been phoning? could he have been phoning? could we have been phoning? could you have been phoning? could they have been phoning?

Interro-negative form

Simple form	V-ing form
could I not phone? could you not phone? could he not phone? could we not phone? could you not phone? could they not phone?	could I not be phoning? could you not be phoning? could he not be phoning? could we not be phoning? could you not be phoning? could they not be phoning?
Perfect	V-ing perfect
could I not have phoned? could you not have phoned? could he not have phoned? could we not have phoned? could you not have phoned? could they not have phoned?	could I not have been phoning? could you not have been phoning? could he not have been phoning? could we not have been phoning? could you not have been phoning? could they not have been phoning?