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1、名词性从句的种类主语从句主语从句注意点注意点1).主语从句一律用主语从句一律用陈述句语序陈述句语序,即主语在前即主语在前,谓语在后谓语在后.例例:误误:When will he come is not known.正正:When he will come is not known.宾语从句宾语从句注意点注意点1).1).宾语从句一律用宾语从句一律用陈述句语序陈述句语序.2).2).引导宾语从句的连词引导宾语从句的连词that也无实际意义也无实际意义,多多数情况下可以省略数情况下可以省略.宾语从句宾语从句注意点注意点3).3).whether和和if都可以引导宾语从句，但都可以引导宾语从句，但:
2、(1)(1)当当whether后紧跟后紧跟or not时时,不用不用if.例例:I dont know whether I will stay or not.(2)(2)介词后面介词后面的宾语从句不能用的宾语从句不能用if.if.例例:I worry about whether I hurt her feeling.表语从句表语从句注意点注意点1).1).表语从句一律用表语从句一律用陈述句语序陈述句语序.2).2).表语从句的引导词表语从句的引导词that无实际意义无实际意义,但但不能不能省略省略.3).3).表语从句只能用表语从句只能用whether,而而不能用不能用if引导引导.表语从句表
3、语从句注意点注意点4).4).不要使用不要使用 The reason is because that 句型句型,应使用应使用 The reason is that 或或 This/it/that/is because等句型等句型.例：误例：误:The reason why he was late is because that there was a lot of traffic on the road.表语从句表语从句注意点注意点(1)The reason is that 正正:The reason why he was late is that there was a lot of tra
4、ffic on the road.(2)This/it/that/is because 或或:He was late.That was because there was a lot of traffic on the road.同位语从句同位语从句注意点注意点同位语从句和定语从句的同位语从句和定语从句的三点区别三点区别：从从性质性质上区别上区别 从从词类词类上区别上区别 从从引导词引导词及其及其在句子中的成分在句子中的成分上区别上区别 同位语从句同位语从句注意点注意点 1.1.从从性质性质上区别：上区别：定语从句定语从句是从句是从句对其先行词的修饰或限制对其先行词的修饰或限制,属于属于形容词
5、性从句形容词性从句的范畴的范畴;同位语从句同位语从句是从句是从句对前面抽象名词对前面抽象名词的进一的进一步的步的说明和解释说明和解释,属于属于名词性从句名词性从句的范畴。的范畴。同位语从句同位语从句注意点注意点1.1.从从性质性质上区别上区别:1)The news that he told me yesterday was true.2)The news that our team has won the game was true.同位语从句同位语从句注意点注意点 2.2.从从词类词类上区别：上区别：同位语从句同位语从句的的先行词先行词只能是只能是idea,fact,news,belief,
6、suggestion等等抽象名词抽象名词。定语从句定语从句的的先行词先行词可以是可以是名词、代词、主句的名词、代词、主句的 部分或是整个主句部分或是整个主句。同位语从句同位语从句注意点注意点2.2.从从词类词类上区别上区别:1）We are not looking into the question whether he is worth trusting.2）Our team has won the game,which made us very happy.同位语从句同位语从句注意点注意点3.3.从从引导词引导词及其及其在句子中的成分在句子中的成分上区别上区别:1)有些引导词如有些引导词如
7、how,whether,what可以引导同位可以引导同位语从句语从句,但不能引导定语从句。但不能引导定语从句。(if 不能引导同不能引导同位语从句位语从句)例：例：I have no idea whether he could succeed in getting into the college.同位语从句同位语从句注意点注意点 3.3.从从引导词引导词及其及其在句子中的成分在句子中的成分上区别上区别:2 2）that引导引导定语从句定语从句时时,在从句中一般作主语或宾在从句中一般作主语或宾语语(指物时还可以用指物时还可以用which代替代替),),并且作宾语时并且作宾语时常常省略常常省略。
8、that在在同位语从句同位语从句中仅中仅起连接作用起连接作用,不充当任何不充当任何成分成分,并且不能省略并且不能省略,也不能用也不能用which来代替来代替。同位语从句同位语从句注意点注意点例：例：1）The order that we should send a few people to help the other groups was received yesterday.2）The order that we received yesterday was that we should send a few people to help the other groups.嘿嘿嘿嘿，总总算算复复习习完完了了！