Question

which of the加单数还是复数

Answer 1

which of the可加单数，也可以加复数。 

例如：I bought a mountain bike ，which of the wheels are solid tires.我买了一辆山地自行车，它的轮子都是实心轮胎。

I built a cottage in my hometown, which of the yard is full of all kinds of flowers.我在家乡建了一幢别墅，院子里栽满了各种各样的花。

which的用法：

which的意思是：哪个、哪一个，which 用作疑问形容词时，表达选项数目固定或是有限的选项。例：Which time suits you better，11:30 or one o’clock?哪个时间你更方便11点半还是1点？

which用作关系代名词(接在逗号后面)，若which接在逗号后面，which指的是逗号前面所描述的整个事件。例：He showed me round the town，which was very kind of him.他带我参观了这个城镇，他真是太好了。

which的限定用法与非限定用法：which当作关系代名词时，要特别注意限定用法与非限定用法，例：Tom has a cat which can sleep all day.汤姆有一只可以睡整天的猫。