I practice playing the piano every day.(对划线部分提问)playing the piano 是划线部分、、、急求答

问题描述:

I practice playing the piano every day.(对划线部分提问)playing the piano 是划线部分、、、急求答

为什么用the ?因为PLAY 后加乐器前用定冠词the球类则不用!

为什么用the

What do you practice every day?