English verb conjugation
COULD SILVER

Regular verb: silver - silvered - silvered

Affirmation

Simple form	V-ing form
I could silver you could silver she could silver we could silver you could silver they could silver	I could be silvering you could be silvering she could be silvering we could be silvering you could be silvering they could be silvering
Perfect	V-ing perfect
I could have silvered you could have silvered she could have silvered we could have silvered you could have silvered they could have silvered	I could have been silvering you could have been silvering she could have been silvering we could have been silvering you could have been silvering they could have been silvering

Negation

Simple form	V-ing form
I could not silver you could not silver she could not silver we could not silver you could not silver they could not silver	I could not be silvering you could not be silvering she could not be silvering we could not be silvering you could not be silvering they could not be silvering
Perfect	V-ing perfect
I could not have silvered you could not have silvered she could not have silvered we could not have silvered you could not have silvered they could not have silvered	I could not have been silvering you could not have been silvering she could not have been silvering we could not have been silvering you could not have been silvering they could not have been silvering

Interrogative form

Simple form	V-ing form
could I silver? could you silver? could she silver? could we silver? could you silver? could they silver?	could I be silvering? could you be silvering? could she be silvering? could we be silvering? could you be silvering? could they be silvering?
Perfect	V-ing perfect
could I have silvered? could you have silvered? could she have silvered? could we have silvered? could you have silvered? could they have silvered?	could I have been silvering? could you have been silvering? could she have been silvering? could we have been silvering? could you have been silvering? could they have been silvering?

Interro-negative form

Simple form	V-ing form
could I not silver? could you not silver? could she not silver? could we not silver? could you not silver? could they not silver?	could I not be silvering? could you not be silvering? could she not be silvering? could we not be silvering? could you not be silvering? could they not be silvering?
Perfect	V-ing perfect
could I not have silvered? could you not have silvered? could she not have silvered? could we not have silvered? could you not have silvered? could they not have silvered?	could I not have been silvering? could you not have been silvering? could she not have been silvering? could we not have been silvering? could you not have been silvering? could they not have been silvering?