English verb conjugation
MUST PIECE

Regular verb: piece - pieced - pieced

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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