高中英语语法详解：名词遥从句中的同位语从句在复合句中充当同位语。
1.
that引导同位语从句。
在下列名词后可用that引导同位语从句answer, belief,doubt, fact, hope, idea, information, knowledge, law, news, opinion, plan, suggestion, thought, truth等。
I had no idea that you were here.
The story goes that william killed his wife.
注意 ①同位语从句引导词that无含义，不充当成分，遥省略。
②同位语从句与其说明的名词或代词为同一内容,故可以用is把前边的中心词和从句连接成一个句子。
③同位语从句前一般没有逗号。
that引导同位语从句与引导定语从句的区别： that引导同位语从句时只起连接作用，不充当任何成分; that引导定语从句时，在从句中要作成分，如主语、宾语等。
①He told me the news that our team won.
(that引导同位语从句) ②The news that / which he told me was very exciting.
(that引导定语从句，在从句中作宾语) 2.
在no idea, question, problem等后可用wh-疑问词引导同位语从句，if不引导同位语从句。
I have no idea where he has gone.
i have no idea what he said.
3.
辨析:引导名词遥从句时what与whatever, who与whoever的区别： what 与whatever： What you want has been sent here.
( what = the thing(s) that/all that/anything that特指) Whatever you want makes no difference to me.
(whatever = anything that泛指) What caused the accident was a broken bottle.
(特指) Whatever caused the accident has not yet been found.
(泛指) who 与whoever ： Who will go to beijing on business has not been decided.
(who表疑问，表示“谁”，“哪一个”)。
Whoever breaks the law should be punished.
(whoever = anyone who，表示“无论哪个人”)