English verb conjugation
COULD TELEPHONE

Regular verb: telephone - telephoned - telephoned

Affirmation

Simple form	V-ing form
I could telephone you could telephone she could telephone we could telephone you could telephone they could telephone	I could be telephoning you could be telephoning she could be telephoning we could be telephoning you could be telephoning they could be telephoning
Perfect	V-ing perfect
I could have telephoned you could have telephoned she could have telephoned we could have telephoned you could have telephoned they could have telephoned	I could have been telephoning you could have been telephoning she could have been telephoning we could have been telephoning you could have been telephoning they could have been telephoning

Negation

Simple form	V-ing form
I could not telephone you could not telephone she could not telephone we could not telephone you could not telephone they could not telephone	I could not be telephoning you could not be telephoning she could not be telephoning we could not be telephoning you could not be telephoning they could not be telephoning
Perfect	V-ing perfect
I could not have telephoned you could not have telephoned she could not have telephoned we could not have telephoned you could not have telephoned they could not have telephoned	I could not have been telephoning you could not have been telephoning she could not have been telephoning we could not have been telephoning you could not have been telephoning they could not have been telephoning

Interrogative form

Simple form	V-ing form
could I telephone? could you telephone? could she telephone? could we telephone? could you telephone? could they telephone?	could I be telephoning? could you be telephoning? could she be telephoning? could we be telephoning? could you be telephoning? could they be telephoning?
Perfect	V-ing perfect
could I have telephoned? could you have telephoned? could she have telephoned? could we have telephoned? could you have telephoned? could they have telephoned?	could I have been telephoning? could you have been telephoning? could she have been telephoning? could we have been telephoning? could you have been telephoning? could they have been telephoning?

Interro-negative form

Simple form	V-ing form
could I not telephone? could you not telephone? could she not telephone? could we not telephone? could you not telephone? could they not telephone?	could I not be telephoning? could you not be telephoning? could she not be telephoning? could we not be telephoning? could you not be telephoning? could they not be telephoning?
Perfect	V-ing perfect
could I not have telephoned? could you not have telephoned? could she not have telephoned? could we not have telephoned? could you not have telephoned? could they not have telephoned?	could I not have been telephoning? could you not have been telephoning? could she not have been telephoning? could we not have been telephoning? could you not have been telephoning? could they not have been telephoning?