【正文】 C. this 同位語從句一般用that, whether，what, which, who, when, where, why, how 等詞引導，常放在fact, news, idea, truth, hope, problem, information, wish,promise, answer, evidence, report, explanation, suggestion, conclusion等抽象名詞后面，說明該名詞的具體內(nèi)容。 discussed。 unlikely。注意：引導主語從句，不能用if不能在開頭，只能用whether。It is a mystery to me how it all happened.It is mon knowledge that the whale is not a fish.It is no surprise that Bob should have won the game. b It is +形容詞+從句It is necessary that … 有必要……；It is clear that … 很清楚……；It is likely that … 很可能……；It is important that … 重要的是……類似的形容詞還有：strange。c It is +過去分詞+從句It is said that … 據(jù)說……；It is reported that … 據(jù)報道……；It has been proved that … 已證明……；It must be proved that… 必須指出……類似的過去分詞還有：known。如：What we need is money. 我們需要的是錢。ll discuss the problem whether the sports meeting will be held on 。 B. that C. this 如:The news that our team has won the game was true. 我們隊贏了那場比賽的消息是真的?(同位語從句,補充說明news到底是一個什么消息)The news that he told me yesterday was true. 昨天他告訴我的那個消息是真的?(定語從句,news在從句中作told的賓語)I made a promise that if anyone set me free I would make him very rich. 我許諾如果誰讓我自由,我就讓他非常富有?(同位語從句,補充說明promise到底是一個什么諾言)The mother made a promise that pleased all her children. 媽媽做出了一個令她的孩子們高興的許諾?(定語從句,promise在從句中作pleased的主語?)3. 從引導詞及其在句子中的成分上區(qū)別有些引導詞如how, whether, what可以引導同位語從句,但不能引導定語從句?如:That question whether we need it has not been considered. 我們是否需要它這個問題還沒有考慮?(同位語從句)I have no idea what has happened to him. 我不知道他發(fā)生了什么事?(同位語從句)引導詞that引導定語從句時,在從句中一般作主語或賓語(指物時還可以用which代替),并且作賓語時常常省略?that在同位語從句中僅起連接作用,不充當任何成分,并且不能省略,也不能用which來代替?如:The order that we should se