名词性从句.doc

在复合句中起名词作用的从句叫名词性从句。名词从句的功能相当于名词词组,它在复合句中能担任主语、宾语、表语、同位语、介词宾语等,因此根据它在句中不同的语法功能,名词从句又可分别称为主语从句、宾语从句、表语从句和同位语从句。,whether,ifasif/asthough(表语从句)连接代词what,who,whom,whose,which,whoever,whatever,whichever连接副词when,where,how,。★TomorrowisTom’?,在名词性从句中不充当任何成分,而____________是连接代词,在名词性从句中充当成分,通常充当主语,宾语,表语。★_____wasmostimportanttoher,shetoldme,★—It’sthirtyyearssincewelastmet.—ButIstillrememberedthestory,believeitornot,,,但在下面三种情况下,that不可省略☆Hesaid(that)themeetingwasveryimportantandthatweshouldtakepartinit.☆Ithinkitnecessarythatweshouldincreaseourawarenessofenvironmentalprotection.☆1)))_____________________从句中表示“是否”,必须用whether(主语从句中,it作形式主语时,可用if)2)宾语从句中一般情况下whether与if可以通用,但在以下情况下不能用if,只能用whether:’’