English verb conjugation
COULD PIONEER

Regular verb: pioneer - pioneered - pioneered

Affirmation

Simple form	V-ing form
I could pioneer you could pioneer she could pioneer we could pioneer you could pioneer they could pioneer	I could be pioneering you could be pioneering she could be pioneering we could be pioneering you could be pioneering they could be pioneering
Perfect	V-ing perfect
I could have pioneered you could have pioneered she could have pioneered we could have pioneered you could have pioneered they could have pioneered	I could have been pioneering you could have been pioneering she could have been pioneering we could have been pioneering you could have been pioneering they could have been pioneering

Negation

Simple form	V-ing form
I couldn't pioneer you couldn't pioneer she couldn't pioneer we couldn't pioneer you couldn't pioneer they couldn't pioneer	I couldn't be pioneering you couldn't be pioneering she couldn't be pioneering we couldn't be pioneering you couldn't be pioneering they couldn't be pioneering
Perfect	V-ing perfect
I couldn't have pioneered you couldn't have pioneered she couldn't have pioneered we couldn't have pioneered you couldn't have pioneered they couldn't have pioneered	I couldn't have been pioneering you couldn't have been pioneering she couldn't have been pioneering we couldn't have been pioneering you couldn't have been pioneering they couldn't have been pioneering

Interrogative form

Simple form	V-ing form
could I pioneer? could you pioneer? could she pioneer? could we pioneer? could you pioneer? could they pioneer?	could I be pioneering? could you be pioneering? could she be pioneering? could we be pioneering? could you be pioneering? could they be pioneering?
Perfect	V-ing perfect
could I have pioneered? could you have pioneered? could she have pioneered? could we have pioneered? could you have pioneered? could they have pioneered?	could I have been pioneering? could you have been pioneering? could she have been pioneering? could we have been pioneering? could you have been pioneering? could they have been pioneering?

Interro-negative form

Simple form	V-ing form
couldn't I pioneer? couldn't you pioneer? couldn't she pioneer? couldn't we pioneer? couldn't you pioneer? couldn't they pioneer?	couldn't I be pioneering? couldn't you be pioneering? couldn't she be pioneering? couldn't we be pioneering? couldn't you be pioneering? couldn't they be pioneering?
Perfect	V-ing perfect
couldn't I have pioneered? couldn't you have pioneered? couldn't she have pioneered? couldn't we have pioneered? couldn't you have pioneered? couldn't they have pioneered?	couldn't I have been pioneering? couldn't you have been pioneering? couldn't she have been pioneering? couldn't we have been pioneering? couldn't you have been pioneering? couldn't they have been pioneering?