unit2languagepoints更新

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1、Unit2languagepoints1.现在分词在句中作状语，表伴随，与主语是主动关系。Thesadfellowlayonthegrass,staringatthesky.Iwrotealetterhopingtogetfurtherinformation.2.bylunchtime到午饭时间为止by“在…之前”Ihavetogobackby10o’clock.3.情态动词+havedone⑴couldhavedone①对过去事实的推测（否定和疑问句）Whatcouldhavehappened?Hecouldn’thaveat

2、tendedthemeeting,hewenttoBeijinglastweek.②本来能够做某事但没有（肯定句）Hecouldhavepassedtheexam,buthedidn’t.⑵musthavedone对过去发生事情的肯定猜测Itmusthaverainedlastnight.⑶should/oughttohavedone本应该做某事但没有Yououghttohavefinishedyourhomework.⑷shouldn’t/oughtn’ttohavedone本不该做某事但做了Yououghtn’ttohavet

3、oldhimthebadnews.⑸needn’thavedone本没必要做某事但做了Youneedn’thavetakenataxi.⑹may/mighthavedone表推测It’slate.Hemay/mighthavegonetobad.4.单个过去分词作定语放在名词之前过去分词短语作定语放在名词之后。（表被动）thebrokencupthelostboythespokenEnglishthecupbrokenbyTomtheEnglishspokeninChinathemuttoncookedinthefinestoil

4、5.“否定词+比较级”表最高级意思。“没什么比…更…”Nobodyinhisclassisclevererthanhim.Nothingismorepleasantthantraveling.-Howareyougettingonwithyournewjob?-Nothingcouldbebetter/Itcouldn’tbebetter.6.seem似乎好像①seemtodosthHeseemstoknowtheanswer.②itseemsthat…Itseemsthatheknowstheanswer.7.drivev驱使迫

5、使（drovedriven）drivesbmad是某人发疯8.have+宾语+宾补①havesbdoingsth让某人一直做某事I’msorrytohaveyouwaiting.②havesbdosth让某人做某事Ihavehimopenthedoor.③havesthdone让某事被做Ihadmybikerepairedyesterday.④havesthtodo有某事要去做Ihavealotofhomeworktodo.9.onadj①(水/电开着的)Thelightswereon.②正在举行Themeetingison.③上

6、演ThemoviehadbeenonwhenIgottothecinema.10.as作连词①“随着”引导时间状语从句Astimewentby,hiswordsprovedtobecorrect.(withtimegoingby)②“因为”引导原因状语从句Ashewasill,hecouldn’tgotoschool.③“尽管”引导让步状语从句Youngasheis,heknowsalot.注意：名词/形容词+as/though+主语+动词Childasheis，heknowstohelpothers.④as引导方式状语从句“正如

7、；按照；像”asweallknowasisknowntoallasyourcanseeDoinRomeastheRomansdo.入乡随俗Hewassuccessful,aswehadexpected.正如我们所预料的，他成功了。11.If条件句⑴真实条件句（主将从现）Iwon’tgoshoppingifitrainstomorrow.⑵虚拟条件句①与现在事实相反从句用一般过去时（were）主句用would+V原IfIwereabird,Iwouldflyinthesky.IfIhadenoughmoney,Iwouldbuyac

8、ar.②与过去事实相反从句用过去完成时主句用wouldhavedoneIfIhadknownyourphonenumber,Iwouldhavecalledyouyesterday.注意：错综条件句：IfIhadstudiedhard,Iwould