which後接名字單數還是附屬

which後面加可數名詞的單數和複數都可以

它可以翻譯成：哪一個，也可以翻譯成：哪一些比如：Which book do you want? 你想要哪一本書Which glasses do you want? 你想要（喜歡）哪些眼鏡

如果which指代的先行詞是物，根據物的性質，可以是單數，也可以是複數。

如：

She gave me a book， which is expensive.

She gave me some books， which are bought from a nearby bookshop.

但which指代的先行詞也可能是前面整個一個句子，那個這個時候which後面的謂語動詞只能用單數。

如：

She got an A in the exam， which was due to her diligence.