could piece
Regular verb: piece - pieced- pieced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?