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名词性从句练习1.Whatheneedsareenoughtimeandwhatineedisenoughbooks.2.Theproblemismoreandmoreyoungpeoplearegettingintothehabitofsmoking.3.Ifheisanengineerisunknown.4.Whatshewantstoknowisifsheshouldattendtheconference.5.Atthemeetingheraisedaquestioniftheprojectwouldbeconcelled.6.Itdependsonifit'sgoingtorain.7.WeexpressedthehopewhichtheBrownswouldcometoChinaagain.8.Thereasonwhyhefailedintheexamwasbecausehewastoocareless.9.Nomatterwhocomestovisittheexhibitioniswelcome.1.改正：WhatheneedsisenoughtimeandwhatIneedareenoughbooks.解释：what引导的主语从句，动词的数应该根据事实来判断。2.改正：Theproblemisthatmoreandmoreyoungpeoplearegettingintothehabitofsmoking.解释：表语从句的that不能省略。3.改正：Whetherheisanengineerisunkown.解释：主语从句的“是否”只能用whether,不能用if.4.改正：Whatshewantstoknowiswhethersheshouldattendtheconference.解释：表语从句的“是否”用whether，不能用if。5.改正：Atthemeetingheraisedaquestionwhethertheprojectwouldbecancelled.解释：同位语从句的“是否”用whether,不能用if。6.改正：Itdependsonwhetherit'sgoingtorain.解释：介词后的宾语从句的“是否”用whether,不能用if.7.改正：WeexpressedthehopethattheBrownswouldcometoChinaagain.解释：同位语从句的引导词t不用which用that.8.改正：Thereasonwhyhefailedintheexamwasthathewastoocareless.解释：用表语从句来解释原因时，引导词用that,不用because.9.改正：Whoevercomestovisittheexhibitioniswelcome.解释：nomatter不能引导主语从句,但是whoever可以。