医学英语42讲解.pptx

医学英语课程Firstaid国家级临床医学专业教学资源库语法篇

定语从句语法讲解Non-finite

1.Themanisaworker.2.Themanisspeakingatthemeeting.合并句子:Themanwhoisspeakingatthemeetingisaworker.主句从句

定语从句概念:在复合句中修饰名词或代词的句子.(Attributiveclause)Maryisabeautifulgirl.Maryisagirlwhohaslonghair.形容词作定语句子作定语,修饰girl,叫做定语从句

Maryisagirl.(主句)Maryhaslonghair.(从句)合并为一个句子Maryisagirlwhohaslonghair.主句定语从句

先行词关系词定语从句Maryisagirlwhohaslonghair.关系代词关系副词which,thatwho,whom,whoseWhere,when,why

定语从句的用法:1.当先行词是物时,用which或that引导.Thesearethetreeswhich/thatwereplantedlastyear.2.当先行词是人时,用who,whom,whose,that引导.Thesearethestudentswho/thatwonthefirstplacelastyear.Thegirl(whom)ImetisLucy.AchildwhoseparentsaredeadiscalledTom.

3.who,whom,whose,that用法区别.⑴who作定语从句的主语或宾语.Themanwhoisspeakingatthemeetingisaworker.Themanisaworker.(主句)Themanisspeakingatthemeeting.(从句)分解作主语

⑵Whom作定语从句的宾语Thewomanwhomtheywantedtovisitisateacher.Thewomanisateacher.(主句)Theywantedtovisitthewoman.(定语从句)分解作宾语

⑶whose作定语从句的定语.Iknowthegirlwhosemotherisateacher.分解Iknowthegirl.(主句)Thegirl’smotherisateacher.定语从句作定语

⑷that可以作定语从句的主语和宾语.注意:关系代词作动词宾语时可省略.Thewoman(whom/that)theywantedtovisitisateacher.分解Thewomanisateacher.(主句)Theywantedtovisitthewoman.(定语从句)作宾语

Haveatry指出关系代词（副词）在定语从句中的成份：1.ThemanwhocametoourschoolisMr.Wang.()2.Thegirl(whom)ImetisLucy.()3.AchildwhoseparentsaredeadiscalledTom.()4.Ilikethebook(which)youboughtyesterday.()主语宾语定语宾语

4.只能用that的情况①序数词或形容词最高级修饰先行词时TomisthecleverestboythatIhaveeverknown.