English verb conjugation
COULD TAPER

Regular verb: taper - tapered - tapered

Affirmation

Simple form	V-ing form
I could taper you could taper she could taper we could taper you could taper they could taper	I could be tapering you could be tapering she could be tapering we could be tapering you could be tapering they could be tapering
Perfect	V-ing perfect
I could have tapered you could have tapered she could have tapered we could have tapered you could have tapered they could have tapered	I could have been tapering you could have been tapering she could have been tapering we could have been tapering you could have been tapering they could have been tapering

Negation

Simple form	V-ing form
I could not taper you could not taper she could not taper we could not taper you could not taper they could not taper	I could not be tapering you could not be tapering she could not be tapering we could not be tapering you could not be tapering they could not be tapering
Perfect	V-ing perfect
I could not have tapered you could not have tapered she could not have tapered we could not have tapered you could not have tapered they could not have tapered	I could not have been tapering you could not have been tapering she could not have been tapering we could not have been tapering you could not have been tapering they could not have been tapering

Interrogative form

Simple form	V-ing form
could I taper? could you taper? could she taper? could we taper? could you taper? could they taper?	could I be tapering? could you be tapering? could she be tapering? could we be tapering? could you be tapering? could they be tapering?
Perfect	V-ing perfect
could I have tapered? could you have tapered? could she have tapered? could we have tapered? could you have tapered? could they have tapered?	could I have been tapering? could you have been tapering? could she have been tapering? could we have been tapering? could you have been tapering? could they have been tapering?

Interro-negative form

Simple form	V-ing form
could I not taper? could you not taper? could she not taper? could we not taper? could you not taper? could they not taper?	could I not be tapering? could you not be tapering? could she not be tapering? could we not be tapering? could you not be tapering? could they not be tapering?
Perfect	V-ing perfect
could I not have tapered? could you not have tapered? could she not have tapered? could we not have tapered? could you not have tapered? could they not have tapered?	could I not have been tapering? could you not have been tapering? could she not have been tapering? could we not have been tapering? could you not have been tapering? could they not have been tapering?