主语从句讲义高考英语一轮复习 .docx

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1、主语从句一、定义首先主语是指动作的发起者或执行者，当一个从句在主从复合句中作主语成分时，就称之为主语从句，引导主语从句的词称之为引导词或连接词。That Tom got the first place in the class made Linda happy. Tom获得班上第一名，让Linda很开心。(Tom got the first place 为主语从句，That为引导词)二、引导词/连接词(一)that(that在主语从句中只起连接作用，无实际意义，不作成分)1.that主语从句放句首(这类主语从句中，that不能省略)That Tom will go home on Nation

2、al Day makes his parents happy. Tom国庆节回家，这让他父母感到很开心。(That引导主语从句Tom will go home on National Day )2.that主语从句后置(这类主语从句中，it作形式主语，真正主语是that引导的主语从句，此时that一般也不能省略，非正式有时会出现省略)It suddenly occurs to Tom that he forgot to feed the cat. Tom突然想起他忘记喂猫了。(it作形式主语，真正主语是that引导的主语从句he forgot to feed the cat)It is imp

3、ortant that we learn English well. 学好英语是很重要的。(it作形式主语，真正主语是that引导的主语从句we learn English well)It is a good idea that we will go fishing tomorrow. 我们明天会去钓鱼，这是个好主意。(it作形式主语，真正主语是that引导的主语从句we will go fishing tomorrow)It is reported that it is going to rain tomorrow. 据报道，明天会下雨。(it作形式主语，真正主语是that引导的主语从句it

4、 is going to rain tomorrow)(二)if/whether(if/whether在主语从句中起连接作用，翻译为是否，不作成分，不能省略)1.更常用whether主语从句，放句首或后置，if主语从句只能放在it 作形式主语时的后置从句。Whether Linda will come to Guangzhou is not sure. Linda是否会来广州，还不确定。(whether引导主语从句Whether Linda will come to Guangzhou)Whether you succeed or not doesnt matter. 你是否成功并不要紧。(w

5、hether引导主语从句Whether you succeed or not)It is doubtful whether/if Tom will arrive here on time tomorrow. 明天Tom是否能按时到这儿，还不能确定。(it作形式主语，真正主语是whether/if引导的主语从句whether Tom will arrive here on time tomorrow)(三)其他连接词(起连接作用，根据具体词翻译对应意思，主要作主语、宾语、表语、定语、状语)1.连接代词: what, whatever, who, whoever, whose, which, wh

6、ichever.What we dont have always attracts us. 我们没有的东西总是会吸引我们。(what引导主语从句What we dont have，此时what在主语从句中作宾语)Who will win the match is not sure. 谁将赢得比赛还不知道。(who引导主语从句Who will win the match，此时who在主语从句中作主语)2.连接副词: why, when, whenever, where,wherever, how.When the train will arrive has been announced. 火车什

7、么时候到，已经公布了。(when引导主语从句When the train will arrive，此时when在主语从句中作状语)Whenever you come is welcomed. 随时欢迎你来。(whenever引导主语从句Whenever you come，此时whenever在主语从句中作状语)三、注意点主语从句与宾语从句举例区分易混淆点1.it形式主语/形式宾语It is necessary that we should learn English well. 我们学好英语是必要的。(it作形式主语，真正主语是that引导的主语从句we should learn Englis

8、h well)Tom thinks it necessary that we should learn English well. Tom认为我们学好英语是必要的。(it作形式宾语，真正宾语是that引导的宾语从句we should learn English well)2.whether是否Whether Linda will go shopping with me tomorrow is not sure. Linda明天是否会和我一起去购物，还不确定。(whether引导主语从句Whether Linda will go shopping with me tomorrow)Whether Linda will go shopping with me tomorrow, I dont know. Linda明天是否会和我一起去购物，我还不知道。(whether引导宾语从句Whether Linda will go shopping with me tomorrow)