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 couldn't phone you couldn't phone he couldn't phone we couldn't phone you couldn't phone they couldn't phone	I couldn't be phoning you couldn't be phoning he couldn't be phoning we couldn't be phoning you couldn't be phoning they couldn't be phoning
Perfect	V-ing perfect
I couldn't have phoned you couldn't have phoned he couldn't have phoned we couldn't have phoned you couldn't have phoned they couldn't have phoned	I couldn't have been phoning you couldn't have been phoning he couldn't have been phoning we couldn't have been phoning you couldn't have been phoning they couldn't 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
couldn't I phone? couldn't you phone? couldn't he phone? couldn't we phone? couldn't you phone? couldn't they phone?	couldn't I be phoning? couldn't you be phoning? couldn't he be phoning? couldn't we be phoning? couldn't you be phoning? couldn't they be phoning?
Perfect	V-ing perfect
couldn't I have phoned? couldn't you have phoned? couldn't he have phoned? couldn't we have phoned? couldn't you have phoned? couldn't they have phoned?	couldn't I have been phoning? couldn't you have been phoning? couldn't he have been phoning? couldn't we have been phoning? couldn't you have been phoning? couldn't they have been phoning?