你問的是which 用於定語從句中的用法吧?關於which 的用法可以總結如下:
一 which可以引導定語從句, 修飾表示事物的先行詞, 在定語從句中充當主語、 賓語或者表語。例如: He was reading a book, which was about war。 他正在讀一本關於戰爭的書。(關係代詞which在修飾book的定語從句中充當主語。)
He was reading a book, which he had bought from London。 他正在讀一本書, 這本書是從倫敦買回來的。(關係代詞which在修飾book的定語從句中充當賓語。)
二which引導非限定性定語從句時有一個特殊用法, 即它所引導的非限定性定語從句修飾主句中更多的部分甚至整個主句(這時被定語從句所修飾的“先行詞”要作廣義理解), which仍在定語從句中作主語、 賓語或表語。例如:
He set free the birds happily, which was a celebration for his success。 他開心地把鳥放了, 這是對他成功的一種慶祝。
把非限定性定語從句“which was a celebration for his success”的先行詞視為主句中的“the birds”顯然不符合整句的語境, 被“which was a celebration for his success”所修飾的是整個主句, which所引導的這類特殊的非限定性定語從句對主句所敘述的情況進行某種意義的補充說明, which常可譯為“這一點, 這件事
前邊可以加句子,例如:
1。There are two points which I wanted to make。我想要指出的有兩點。
2。We are still friends, though, which is good。不過我們仍然是朋友,這令人感到欣慰。
3。There was one respect, however, in which they differed。然而,他們在一點上有分歧。
可以的,定語從句就是這種型別的,如I often go shopping in the store which is the biggest shop in our city。
which前不可以加句子,只能加名詞或短語。