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 couldn't piece you couldn't piece he couldn't piece we couldn't piece you couldn't piece they couldn't piece	I couldn't be piecing you couldn't be piecing he couldn't be piecing we couldn't be piecing you couldn't be piecing they couldn't be piecing
Perfect	V-ing perfect
I couldn't have pieced you couldn't have pieced he couldn't have pieced we couldn't have pieced you couldn't have pieced they couldn't have pieced	I couldn't have been piecing you couldn't have been piecing he couldn't have been piecing we couldn't have been piecing you couldn't have been piecing they couldn't 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
couldn't I piece? couldn't you piece? couldn't he piece? couldn't we piece? couldn't you piece? couldn't they piece?	couldn't I be piecing? couldn't you be piecing? couldn't he be piecing? couldn't we be piecing? couldn't you be piecing? couldn't they be piecing?
Perfect	V-ing perfect
couldn't I have pieced? couldn't you have pieced? couldn't he have pieced? couldn't we have pieced? couldn't you have pieced? couldn't they have pieced?	couldn't I have been piecing? couldn't you have been piecing? couldn't he have been piecing? couldn't we have been piecing? couldn't you have been piecing? couldn't they have been piecing?