小補充：

如果先行詞為the place後面接where時，因為the place這詞意思不明確，還可以乾脆把它省略掉，變成where開頭的名詞子句用法（詳見《G13-04英文老師詳解第三款名詞子句疑問詞子句用法》)。啥意思？看一下例句吧～

E.g.: Taipei is the place (in which I grew up). 

= Taipei is the place (where I grew up). 

= Taipei is x (where I grew up). ← 名詞子句

「台北是我成長的地方。」

Q：先行詞表地方時，後面關代都用where吧？

A：不一定唷～要回到形容詞子句中where用法的正確觀念

1. 精確來說，where是關係副詞，不是關係代名詞

2. where = 介系詞(in/ on/ at…) + which。所以原本的形容詞子句裡要找個出這結構才能換成where呀～看個例句比較一下

E.g.: 

1.  We had a lovely meal at the restaurant (which Paul recommended).「我們在保羅推薦的餐廳吃了美妙的一餐。」 
    

2.  We had a lovely meal at the restaurant (where Paul worked).「我們在保羅工作的餐廳吃了美妙的一餐。」 
    

為什麼先行詞一樣都是the restaurant，但後面關代的位置一個用which，一個用where。這是爲什麼呢？

想想例句(2)，如果把先行詞the restaurant放進去形容詞子句看，你得到什麼句子呢？→ Paul worked in/at the restaurant. 

換言之，原本的形容詞子句為 We had a lovely meal at the restaurant (in/at which Paul worked). 有看到「介系詞(in/ on/ at…) + 關代(where)」的結構了嗎？有，才能換成where唷～而例句(1)僅有關代which，前面沒有介系詞，故不能換成where. 

(如果不懂何謂「先行詞放進子句裡看」這概念，請先詳讀《G14-01形容詞子句基礎篇(I)：形容詞子句是什麼？ 教你先行詞為人，且為主格型關代的形容詞子句運用！》/《 G14-02形容詞子句基礎篇(II): 先行詞為人，關代為受格或所有格時的形容子句應用》/ 《G14-03形容詞子句基礎篇(III)：先行詞為物，關代為主格、 受格、 所有格的形容詞子句應用》討論形容詞子句基礎概念的文章。)

有概念後，再來一組例句小試身手看看觀念通不通。下面選項請自行選出正確答案～
 

1. We visited Paris, (which/ where) is famous for its fashion industry and architecture. 

2. We visited Paris, (which/ where) we visited a lot of famous tourist spots, including the Eiffel Tower and the Louvre Museum. 
    

Ans: 1. which   2. where

小補充：

如果先行詞是the day, the time, 或the year時，則下面二種情況之一都可以：

1.  後面的關係副詞when可換成that，或直接省略。

2.  先行詞不見，保留when (此時為名詞子句用法，詳見《G13-04英文老師詳解第三款名詞子句疑問詞子句用法》）

E.g.: I will never forget the day (on which the terrible accident happened). 

     = I will never forget the day (when the terrible accident happened). 

     = I will never forget the day ((that) the terrible accident happened). 

     = I will never forget x (when the terrible accident happened). ← 名詞子句

「我永遠不會忘記這可怕意外發生的那天。」

Q: 為什麼這邊的介系詞一定是for，不會是其他介系詞呢？

A: 那是因為the reason搭配的介系詞恆為for。看一下上面第一個例句，如果把先行詞the reason放進去該形容詞子句，會得到什麼句子呢？

→ He was absent at the meeting yesterday for the reason. 

「他因為這理由昨天沒有出席會議。」

因為for the reason這固定用法的關係, 所以這句話換成形容詞子句時，就是for which he was absent at the meeting yesterday，不會用其他介系詞囉～

小補充: why= for which的用法，可以再寫成下列二種情況之一

(1) why可以換成that(此為that名詞子句做同位語的用法，詳見《G13-02三款名詞子句怎麼分辨？ 英文老師詳解 that 名詞子句用法》或直接省略


(2) 先行詞the reason省略（此為另外一種名詞子句用法，詳見《G13-04英文老師詳解第三款名詞子句疑問詞子句用法》)

E.g.: 

Do you know the reason ((that) he was absent at the meeting yesterday)?

= Do you know x (why he was absent at the meeting yesterday)? ← 名詞子句

「你知道為什麼他今天開會不在嗎？」

Q1: 為什麼這邊的in which, 不可以直接用how去取代掉，變成the way how呢？前面三個關係副詞where, when, why不就是取代掉「介系詞＋關代which」而已，前面的先行詞基本上都會保留下來？

A1: 日光英文也不知道，反正how就比較特別一點：p

Q2:  這邊的介系詞一定是in嗎？不可能說成the way on which或是the way at which嗎？

A2: 只能是in喔～因為the way前面搭配的介系詞就是in。舉前面的例句來說～如果把先行詞the way放進該形容詞子句看，你會得到什麼句子呢？

→ He dealt with the crisis in the way. 「他用這方式處理危機。」

因為in the way這固定用法的關係，所以這句話換成形容詞子句時，就會是in which he dealt with the crisis. 而不會出現on which或是at which等其他說法。

小補充：先行詞the way後面可以接that名詞子句，變成有個that名詞子句當作說明the way的同位語用（啥意思？詳見《G13-02三款名詞子句怎麼分辨？ 英文老師詳解 that 名詞子句用法》)，且該that可省略。

換言之，上面的例句還可以寫成= We were all impressed by the way ((that) he dealt with the crisis). ← 名詞子句

where = in/ on/ at….+ which (表地方）

E.g.1: The house (in which I lived before) has collapsed. 

= The house (where I lived before) has collapsed. 

「我以前住的房子已經倒了。」


E.g.2: The place (in which I grew up) has changed a lot. 

= The place (where I grew up) has changed a lot. 

= (Where I grew up) has changed a lot. 

「我長大的地方已經變了很多。」

when = in/ on/ at….+ which (表時間）

E.g.1: I still remember the old days (on which we played together). 

= I still remember the old days (when we played together). 

「我還記得我們玩在一起的老時光。」


(先行詞是the day, the time或the year時，when可換成that或省略，抑或是這些先行詞可省略）

E.g.2: Do you still remember the time (at which we worked together)?

= Do you still remember the time (when we worked together)?

= Do you still remember the time ((that) we worked together)?

= Do you still remember x (when we worked together)?

「你還記得我們一起工作的時光嗎？」

why = for which（表原因）

E.g.: Do you know the reason (for which he quit the job)?

= Do you know the reason (why he quit the job)?

= Do you know the reason ((that) he quit the job)?

= Do you know x (why he quit the job)?

「你知道他為什麼辭職嗎？」

how = the way in which (表方式）

E.g.: Could you tell me the way (in which we can solve the problem)?

= Could you tell me (how we can solve the problem)?

= Could you tell me the way ((that) we can solve the problem)?

「你可以告訴我我們可以解決這問題的方式嗎？」