thought，hope，message，suggestion，word（訊息），possibility等。I’ve come from Mr. Wang with a message that he won’t be able to see you this afternoon我從王先生那裡來，他讓我告訴你他今天下午不能來看你了。
There was a suggestion that Brown should be dropped from the team.
有一項建議是布朗應該離隊。
2.連詞
英語中引導同位語從句的詞通有that，whether，連線代詞what，who，連線副詞how, when, where等。（注：if, which 不能引導同位語從句。）
（1）連詞that引導同位語從句（注：引導同位語從句的that不能省略The idea that you can do this work well without thinking is quite wrong.
你認為不動腦筋就能做好這件工作的想法是完全錯誤的。（作idea的同位語）
【注意】引導同位語從句的連詞that通常不省略。
（2）連詞whether引導同位語從句（注：if不能引導同位語從句）
The question whether we should call in a specialist was answered by the family doctor.
我們是否請專家由家庭醫生來定。
He must answer the question whether he agrees to it or not.
他必須回答他是否同意這樣一個問題。
（3）其它引導詞引導的同位語從句
A.連線代詞
what, who, whom, whose引導同位語從句I have no idea what size shoes she wears.我不知道她穿幾號的鞋。（what作定語）The question who will take his place is still not clear.（who作主語）
B.連線副詞
when, where, how, why 引導同位語從句We haven’t yet settled the question where we are going to spend our summer vacation.到哪兒去度暑假，這個問題我們還沒有決定。
l have no idea when he will be back．我不知道他什麼時候回來。
My question how I shall get in touch with him has not been answered.
3.分隔式同位語從句
有時同位語從句可以不緊跟在說明的名詞後面，而被別的詞隔開。在語法上叫做分隔式同位語從句。
The thought came to him that maybe the enemy had fled the city．
他突然想起可能敵人已經逃出城了。
Several years later，word came that Napoleon himself was coming to inspect them． 幾年以後，有訊息傳來說拿破崙要親自視察他們。
同位語從句
在複合句中充當同位語的名詞性從句稱為同位語從句。一個名詞（或其它形式）對另一個名詞或代詞進行補充說明，這個名詞（或其它形式）就是同位語。
1.用法
同位語從句一般跟在某些名詞後面，用以說明該名詞表示的具體內容。
I heard the news that our team had won．我聽到了我們隊獲勝的訊息。
①可以跟同位語從句的抽象名詞通常有news，idea，fact，promise，question，doubt
thought，hope，message，suggestion，word（訊息），possibility等。I’ve come from Mr. Wang with a message that he won’t be able to see you this afternoon我從王先生那裡來，他讓我告訴你他今天下午不能來看你了。
②在某些名詞表“建議，命令，要求等”（如demand, wish, suggestion, resolution等）後面的同位語從句要用虛擬語氣 （即should+動詞原形；should可省）。
There was a suggestion that Brown should be dropped from the team.
有一項建議是布朗應該離隊。
2.連詞
英語中引導同位語從句的詞通有that，whether，連線代詞what，who，連線副詞how, when, where等。（注：if, which 不能引導同位語從句。）
（1）連詞that引導同位語從句（注：引導同位語從句的that不能省略The idea that you can do this work well without thinking is quite wrong.
你認為不動腦筋就能做好這件工作的想法是完全錯誤的。（作idea的同位語）
【注意】引導同位語從句的連詞that通常不省略。
（2）連詞whether引導同位語從句（注：if不能引導同位語從句）
The question whether we should call in a specialist was answered by the family doctor.
我們是否請專家由家庭醫生來定。
He must answer the question whether he agrees to it or not.
他必須回答他是否同意這樣一個問題。
（3）其它引導詞引導的同位語從句
A.連線代詞
what, who, whom, whose引導同位語從句I have no idea what size shoes she wears.我不知道她穿幾號的鞋。（what作定語）The question who will take his place is still not clear.（who作主語）
B.連線副詞
when, where, how, why 引導同位語從句We haven’t yet settled the question where we are going to spend our summer vacation.到哪兒去度暑假，這個問題我們還沒有決定。
l have no idea when he will be back．我不知道他什麼時候回來。
My question how I shall get in touch with him has not been answered.
3.分隔式同位語從句
有時同位語從句可以不緊跟在說明的名詞後面，而被別的詞隔開。在語法上叫做分隔式同位語從句。
The thought came to him that maybe the enemy had fled the city．
他突然想起可能敵人已經逃出城了。
Several years later，word came that Napoleon himself was coming to inspect them． 幾年以後，有訊息傳來說拿破崙要親自視察他們。
4.定語從句與同位語從句
同位語從句是用於說明所修飾名詞的具體內容的，它與被修飾詞語通常可以劃等號；而定語從句是限制所修飾名詞的，它的作用是將所修飾的名詞與其他類似的東西區別開來。
同位語從句中的引導詞that不做成分，而定語從句中的引導詞that做成分。
定語從句中，關係代詞做賓語可以省略；同位語從句的引導詞不可以省略。
更多知識點可關注下北京新東方的高中聽說讀寫拔高住宿班課程。