English verb conjugation
CAN PIECE

Regular verb: piece - pieced - pieced

Affirmation

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

Negation

Simple form	V-ing form
I can't piece you can't piece he can't piece we can't piece you can't piece they can't piece	I can't be piecing you can't be piecing he can't be piecing we can't be piecing you can't be piecing they can't be piecing
Perfect	V-ing perfect
I can't have pieced you can't have pieced he can't have pieced we can't have pieced you can't have pieced they can't have pieced	I can't have been piecing you can't have been piecing he can't have been piecing we can't have been piecing you can't have been piecing they can't have been piecing

Interrogative form

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

Interro-negative form

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