Unit 4 單元知識點詳解

九年級英語下冊9BUnit4知識點歸納與分析【教材內(nèi)容解析】Comicstrip&WelcometotheunitMeneither(P.50)Meneither意為“我也不……”，源于“neither+be動詞/助動詞/情態(tài)動詞+與前句不同的主語”，用于說明后一句所述的情況與前一句所述的否定情況相同，neither用作副詞，表示“也不”。--Hehasn’tbeentoHongKong.--Meneither.(2)HowdoyoulikelifeonMars?(P.50)Howdoyoulike...?相當于Whatdoyouthinkof...?意思是“你覺得……怎么樣”。--HowdoyouliketheGreatWall?--It’sgreat.Ilikeitverymuch.Andwemightneedsleepingbagstoo.(P.51)might這里意為“可能”，表示推測，另外，might還可以表示請求，意為“可以”。Hesaidhemightbelate,buthewasearly.MightIuseyourbike?ReadingAtpresent,ourspacecraftaretooslowtocarrylargenumbersofpassengerstoMars-itwouldtakemonths.(P.52)anumberof相當于numbersof意為“許多、大量”用來修飾可數(shù)名詞復數(shù)，作主語時，謂語動詞用復數(shù)形式；thenumberof意為“……的數(shù)量”，作主語時，謂語動詞用單數(shù)形式。例如：Anumberofstudentsareplayingtennis.Thenumberofthestudentsinourschoolisover2000.ThegravityonMarsisonlyaboutthree-eighteensofthatontheEarth.(P.53)分數(shù)的表達，分子用基數(shù)詞，分母用序數(shù)詞，分子大于1時，分母加s表示復數(shù)。例如：1/3onethird3/8threeeighths“分數(shù)+of+名詞”作主語時，謂語動詞單復數(shù)，取決于名詞的單復數(shù)。名詞為單數(shù)則謂語動詞用單數(shù)，名詞為復數(shù)則謂語動詞用復數(shù)。1.Twothirdsofthelandiscoveredwithwater.三分之二的陸地都是被水所覆蓋的。2.Onefifthofthestudentscomefromthecountryside.五分之一的學生來自農(nóng)村。(3)Peoplewouldhavetowearbootsthatarespeciallydesignedtopreventthemselvesfromfloatingoffintospace.(P.53)prevent表示“阻止”時，常用于“preventsb.fromdoingsth.”結(jié)構(gòu)中，意為“阻止某人做某事”，動詞prevent也可以換成stop或者keep。Weshouldprevent/stop/keepfarmersfromcuttingtheforests.(4)ComparedwithlifeontheEarth,lifeonMarswouldbebetterinsomeways.(P.53)compare表示“比較”時，常用的結(jié)構(gòu)有兩個：compare...with...“把……同……比較”；compare...to...“把……比作……”。Don’tcompareyourchildrenwithothers’.Weoftencomparethelittlekidstotheflowersofthemotherland.(5)LifeonMarswouldbeinterestingaswellaschallenging.(P.53)aswellas表示“既……又……”，連接兩個成分作主語時，謂語動詞的單復數(shù)通常與aswellas前主語保持一致。MrFanggrowsflowersaswellasvegetables.JackaswellashisparentsisgoingtoLondon.GrammarArescientistsinagreementthatlivingonMarswouldbepossibleforhumansinthefuture?(P.57)agreement名詞，意為“同意、協(xié)議”，inagreement表示“同意、一致”。MrZhangnoddedinagreement.I’mgladweareinagreementaboutonething,atleast.【拓展】agree的用法=1\*GB3①agreewithsb.同意某人Ican’tagreewithyoumore.=2\*GB3②agreetosth.同意某事Doyouagreetotheplan?=3\*GB3③agreeonsth.在某事上達成一致意見Theyfinallyagreedonthedesignofthebridge.=4\*GB3④agreetodosth.同意做某事Herparentsdon’tagreetomarrytheirdaughtertotheman.4.Integratedskills(1)However,someotherstudentswereworriedaboutaboutlivingthere.(P.60)=1\*GB3①worryaboutsb./sth.“為某人/某事而擔心”Youdon’tneedtoworryaboutthecomingexam.=2\*GB3②beworriedaboutsth.“擔心某人/某事”Theparentsareworriedabouttheirsickson.(2)I’mnotsureifit’sworththerisk.(P.60)risk表示“冒險時”，既可以作名詞，也可以作動詞，作名詞常和動詞take連用，takearisk“冒險”；作動詞時，后接動名詞作賓語。Thefiremantooktheriskoflosinghislifeandsavedtheboyfromtheburningbuilding.=Thefiremanriskedlosinghislifeandsavedtheboyfromtheburningbuilding.5.Studyskills&TaskTherearetwomoonstovisit,butmostpeoplemayprefertowatchtheamazinglow-gravitybasketballgamesinstead.(P.63)prefer的用法=1\*GB3①prefersth.tosth.同某物比起來更喜歡某物Ipreferbananastoapples.=2\*GB3②preferdoingsth.todoingsth.同做某事比起來更喜歡做某事Heprefersswimmingtofishing.=3\*GB3③prefertodosth.寧愿做某事Thegirlpreferstostayathomeattheweekends.=4\*GB3④prefertodosth.ratherthandosth.寧愿做某事而不愿做某事，相當于wouldratherdosth.thandosth.Theboyprefertoplayoutsideonhotdaysratherthanstayintheroom.=Theboywouldratherplayoutsideonhotdaysthanstayintheroom.instead的用法instead作副詞，表示“而不是、代替”，常放在句尾，當后面需要接賓語時，用insteadof。Jimdidn’tgototheparkwithhisclassmates.Hestayedintheclassroominstead.=Jimstayedintheclassroominsteadofgoingtotheparkwithhisclassmates.【重點短語】sleepingbags睡袋(all)overagain再、重新ata/thespeedof以……速度intheformof以……形式comparewith與……相比preventsb.fromdoingsth.阻止某人做某事insomeways在某些方面aswellas而且carryout開展、執(zhí)行afterall畢竟【語法講解】簡單句和復合句之間的轉(zhuǎn)換（二）一、含有狀語從句的復合句與簡單句之間的轉(zhuǎn)換在英語中，我們可以用attheageof,becauseof,without...等介詞短語，將含有狀語從句的復合句改為簡單句。Helearnttoswimwhenhewaseightyearsold.→Helearnttoswimattheageofeight.注意：轉(zhuǎn)換時要注意時態(tài)和意思的一致性和準確性。二、含有賓語從句的復合句與簡單句之間的轉(zhuǎn)換在英語中，我們可以用of...,like...等介詞短語，將含有賓語從句的復合句改為簡單句。ThephotosremindmethatItravelledtotheUKfiveyearsago→ThephotosremindmeofmytriptotheUKfiveyearsago.注意：常用的一些動詞和介詞的搭配有：remindsomebodyof...besure/certainabout...3.含有定語從句的復合句與簡單句之間的轉(zhuǎn)換在英語中，我們可以用wi