1 play后面接西洋乐器时,如钢琴、小提琴等，要加定冠词the;但后面接中国传统乐器时,如二胡、琵琶等，不用加定冠词the
2 play +the+乐器名词。He is playing the piano.
棋类、球类名词前不加冠词。He is playing chess. They are playing basketball.
1 play后面接西洋乐器时,如钢琴、小提琴等，要加定冠词the;但后面接中国传统乐器时,如二胡、琵琶等，不用加定冠词the
2 play +the+乐器名词。He is playing the piano.
棋类、球类名词前不加冠词。He is playing chess. They are playing basketball.