English verb conjugation
COULD PIECE

Regular verb: piece - pieced - pieced

Affirmation

Simple form	V-ing form
I could piece you could piece he could piece we could piece you could piece they could piece	I could be piecing you could be piecing he could be piecing we could be piecing you could be piecing they could be piecing
Perfect	V-ing perfect
I could have pieced you could have pieced he could have pieced we could have pieced you could have pieced they could have pieced	I could have been piecing you could have been piecing he could have been piecing we could have been piecing you could have been piecing they could have been piecing

Negation

Simple form	V-ing form
I could not piece you could not piece he could not piece we could not piece you could not piece they could not piece	I could not be piecing you could not be piecing he could not be piecing we could not be piecing you could not be piecing they could not be piecing
Perfect	V-ing perfect
I could not have pieced you could not have pieced he could not have pieced we could not have pieced you could not have pieced they could not have pieced	I could not have been piecing you could not have been piecing he could not have been piecing we could not have been piecing you could not have been piecing they could not have been piecing

Interrogative form

Simple form	V-ing form
could I piece? could you piece? could he piece? could we piece? could you piece? could they piece?	could I be piecing? could you be piecing? could he be piecing? could we be piecing? could you be piecing? could they be piecing?
Perfect	V-ing perfect
could I have pieced? could you have pieced? could he have pieced? could we have pieced? could you have pieced? could they have pieced?	could I have been piecing? could you have been piecing? could he have been piecing? could we have been piecing? could you have been piecing? could they have been piecing?

Interro-negative form

Simple form	V-ing form
could I not piece? could you not piece? could he not piece? could we not piece? could you not piece? could they not piece?	could I not be piecing? could you not be piecing? could he not be piecing? could we not be piecing? could you not be piecing? could they not be piecing?
Perfect	V-ing perfect
could I not have pieced? could you not have pieced? could he not have pieced? could we not have pieced? could you not have pieced? could they not have pieced?	could I not have been piecing? could you not have been piecing? could he not have been piecing? could we not have been piecing? could you not have been piecing? could they not have been piecing?