stone可數還是不可數

　　例句：

　　The stone steps were worn and broken.

　　這些石頭臺階被磨平破裂了。

　　The stone struck her on the forehead.

　　石頭擊中她的額頭。

　　A large stone landed right beside him.

　　一大塊石頭正好落在他身旁。

　　Most of the houses are built of stone.

　　這些房子多數是用石頭建造的。