(1)表示“纸”时,为不可数名词 a piece of paper/ a sheet of paper
(2)表示“文件,报纸”时,为可数名词
【区分】
He is preparing his papers.
He is reading a paper.
(1)表示“纸”时,为不可数名词 a piece of paper/ a sheet of paper
(2)表示“文件,报纸”时,为可数名词
【区分】
He is preparing his papers.
He is reading a paper.