什么乐器后不加"the"

一般西洋乐器都是要加the的，只有一般由汉语拼音借入英语的民族乐器词汇前是不用冠词的，如erhu（二胡），pipa（琵琶）等~~~

乐器前面都加THE

原则上所有的乐器都需要加The.

民乐不加the

I like to play the piano/ the flute.
My son is learning the piano.
He plays the trumpet in a jazz band.
She sang and her husband accompanied her on the piano.

涉及两种或以上的乐器时不用the:
She teaches violen, vello and piano.
I like to play musical instruments.

说到流行或爵士演奏家的演奏时不用the:
Milles Davis played guitar/trumpet.

吉他