从句what和how的用法与区别.doc

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1、从句what和how的用法与区别what和how的用法比较what讲解what=allthat/thethingthat/thepersonthat.只引导主从，宾从，表从，不能引导定从和同位从，即what前面不能有名词。既起连接作用，又在从句中充当主、宾、表语的成分。即：what+不完整句子，做主从，宾从，表从。例：Whathesaidmademehappy.（主从）what引导主语从句，在从句中作宾语。1.what引导主语从句的特点：a.前面没有东西；b.后面有两个动词。IthoughtthemoviewouldbegoodformyEnglish,but76itturnedout,

2、itwasanItalianmovie.A）sinceB）whenC）whatD）as解析答案为D。2.what引导宾从和表从。公式：动词/介词/系词+that+不完整句子Iknowwhathesaid.（宾从）what引导宾从，在从句中作宾语。Ilistentowhathesaid.（宾从）what引导宾从，在从句中作宾语。Thisiswhathesaid.（表从）what引导表从，在从句中作宾语。例：You80theclockwiththelatesttimeat81youwanttobewakened…81.A)whereB)thisC)whichD)that解析答案为C。Fors

3、tarters,cabinpressuresathighaltitudesaresetatroughly81theywouldbeifyoulivedat5,000to8,000feetabovesealevel.A)whoB)whatC)whichD)that解析答案为B。who在从句中一般做主语，只有在非正式时做宾语。优先原则：however>whether>what…butabirdhasasinglealarmcry,75means“danger!”A）thisB）thatC）whichD）it解析答案为C。做题时，排除其他选项只剩which和that时，有逗号的选which,没

4、逗号的一般选that。Thewordgeography74fromtwoGreekwords,ge,theGreekwordfor“earth”andgraphein,75means“towrite”.75.A）whatB）thatC）whichD）it解析答案为C。Beforeyoubuyanexpensive84,oraservice,docheckthepriceand85isonoffer.85.A)whatB)whichC)thatD)this解析答案为A。what与how的区别what连接代词，必须代替从句中的主/宾/表语。例：Idon’tknowwhattodo.how连接

5、副词，必须代替从句中的方式状语。例：Idon’tknowhowtodoit.Westartedthinkingoftodoaboutit.A)whatB)howC)whetherD)when解析答案为A。Itcausedthemtothinkabout84theymightcontroltheexperiencesofchildren…A）whatB）howC）whateverDhowever解析答案为B。how在从句中作方式状语。