關系代詞有who，whom，whose，that，which，as等，可用作引導從句的關聯詞。它們在定語從句中可作主語、表語、賓語、定語等；另一方面它們又代表主句中為定語從句所修飾的那個名詞或代詞(通稱為先行詞)。

如： He is the man whom you have been looking for.　 他就是你要找的那個人。八、連接代詞：

連接代詞主要有who, whom, whose, what, which, whoever, whomever, whosever,

whatever, which ever等。

連接代詞一般指疑問， 但what, whatever除了指疑問之外， 也可指陳述。

Do you know who has won the Red Alert game? 你知道誰贏了這一局紅警游戲嗎？

I don't know whom you should depend on? 我不知道你該依靠誰。

This book will show you what the best CEO should know. 這本書會告訴你最好CEO的應該了解什么。

Have you determined whichever you should buy, a Nokia walkie-talkie or a Motorola cell phone? 你決定好買諾基亞無線話機呢還是買摩托羅拉手機？