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 couldn't telephone you couldn't telephone she couldn't telephone we couldn't telephone you couldn't telephone they couldn't telephone	I couldn't be telephoning you couldn't be telephoning she couldn't be telephoning we couldn't be telephoning you couldn't be telephoning they couldn't be telephoning
Perfect	V-ing perfect
I couldn't have telephoned you couldn't have telephoned she couldn't have telephoned we couldn't have telephoned you couldn't have telephoned they couldn't have telephoned	I couldn't have been telephoning you couldn't have been telephoning she couldn't have been telephoning we couldn't have been telephoning you couldn't have been telephoning they couldn't 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
couldn't I telephone? couldn't you telephone? couldn't she telephone? couldn't we telephone? couldn't you telephone? couldn't they telephone?	couldn't I be telephoning? couldn't you be telephoning? couldn't she be telephoning? couldn't we be telephoning? couldn't you be telephoning? couldn't they be telephoning?
Perfect	V-ing perfect
couldn't I have telephoned? couldn't you have telephoned? couldn't she have telephoned? couldn't we have telephoned? couldn't you have telephoned? couldn't they have telephoned?	couldn't I have been telephoning? couldn't you have been telephoning? couldn't she have been telephoning? couldn't we have been telephoning? couldn't you have been telephoning? couldn't they have been telephoning?