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1、核心语法I.虚拟语气II.倒装句III.非谓语动词1)分词结构、独立结构2)动词不定式结构3)动名词结构IV.从句V.时态I.虚拟语气1.在表示命令、建议、要求等一类动词后面的从句中，像order,suggest,propose,require,demand,request,insist,command,recommend+(should)do等。2.在非真实条件句中a.与现在事实相反的假设条件从句:一般过去时（be用were,do用did）主句:woulddob.与过去事实相反的假设条件从句:过去完成时主句:wouldhavedonec.表示对将来不大可能发生的事
2、情的假想条件从句:shoulddo;weretodo主句:would+动词原形3.在主语从句中1)Itis(was)demanded(suggested,ordered,required,proposed,desired,recommended,requested,insisted)that…，谓语动词用(should)do2)Itis(was)necessary(advisable,crucial,desirable,essential,important,imperative,preferable,urgent,vital)that…，谓语动词用(should)
3、do3)Itis(was)one’sadvice(desire,demand,idea,order,preference,proposal,recommendation,requirement,suggestion,wish)that…，谓语动词用(should)do4.在表语从句，同位语从句中的应用suggestion,proposal,idea,plan,order,advice等名词后面的表语从句、同位语从句中要用虚拟语气，即（should）+动词原形。5.lest,forfearthat+(should)do(惟恐，免得);incasethat后面可接虚拟语
4、气或者陈述语气从句.例1)Hewearsapairofsunglasses__(惟恐被别人认出来).2)You’dbettertakeasweaterwithyou_(以防天气变冷).6.Butfor…；without要不是…1)Butforthehelpoftheirgroup,wewouldnothavesucceededintheinvestigation.2)Withoutyoursupport,we(绝对不可能克服困难)___.Key:forfearthatheshouldberecognizedincase(that)it(should)turncold
5、;incaseitturnscoldwouldneverhaveovercome/gotoverthedifficulties7．用一般过去时表示现在或将来wouldratherthatsbdidsthItis(high)timethatsbdidsth例：1)Itishigh/abouttimewecooperated.2)Franklyspeaking,I’drather_______(你不要管这件事情)forthetimebeing.8.wish后面的宾语从句;ifonly用法IwishthatIdid（与现在的事实相反）IwishthatIhaddone（与
6、过去事实相反）IwishthatIwoulddo (将来不大可能实现的愿望)例：Hewishes(wished)hehadn'tsaidthat.ifonly（“如果……就好了”）主观愿望更为强烈，用法与wish一样．Key:youdidn’tdoanythingaboutitII.倒装句1.句首为否定或半否定的词语如no,not,never,seldom,little,hardly,innoway,onnoaccount,in/undernocircumstances,notuntil…等。例1)NeverhaveIseensuchapoorperformance
7、.2)Hardly/ScarcelyhadIclosedmyeyeswhenIbegantoimaginethemostfantasticshapes.3)Nosoonerhadthemovedinhisnewhouse_________(就发现周围环境很喧嚣).4)Wehavebeentoldthatundernocircumstances_______(可以用电话)intheofficeforpersonalaffairs.5)Theanti-virusagentwasnotknown__________(直到一名医生偶然发现了它). (正常语序）6)__
