高一英语必修三unit4知识点

UnitFourbyShowsystem系统，制度计划，方法条理，秩序eg：你想要成功生活就要有条理。Youneedsomesysteminyourlifeifyouwanttosucceed.扩展:systematic系统的习题练习：Hershoes_____herdress;theylookverywelltogether.A.suitB.fitC.compareD.matchDmatch与...相似相等相配比较：match&suit&fitmatch：强调从整体上的匹配及搭配效果；suit：指颜色、款式、时机、口味等的适合；fit：侧重尺寸，大小ReadingPart1accordingtowidelyacceptedbeginwithinalldirectionsacloudofintimetodosth.cooldownonthesurfaceofbefoundamentalofinchainsgrowintoforthefirsttimeinthepastgivebirthtoinone'sturnprevent...fromdependonasaresultof习题练习：Inaroomabovethestore,whereaparty_____,someworkerswerebusilysettingthetable.A.wastobeheldB.hasbeenheldC.willbeheldD.isbeingheldAbetodosth.表示注定要发生的事情表示“应当，必须做某事”用于将来事实相反的虚拟语气中eg：所有这一切都要偿还的。（answerfor）Allthesethingsaretobeansweredfor.eg：如果明天下雨的话，我们就呆在家里。Ifitweretoraintomorrow,wewouldstayathome.区别:betodosth.侧重预先安排的计划或约定beabouttodo不与将来时间连用bedoing仅限少量动词（go/come/leave/start/begin/）begoingto指现在打算或将来要做的事情根据某种迹象近期即将发生习题练习：_____we'llgocampingtomorrowdependsontheweather.A.IfB.WhetherC.ThatD.WhereBWhether...ornot用以表示两种非此即彼飞的可能性eg：Ireallydon'tknowwhethertheyareabletofinishthetaskontimeornot.我的确不知道他们能否按时完成任务。eg：Whetheritisfineornot,we'llgotograndma'sthisweekend.不管天气好不好，这个周末我们都要去奶奶家。intime及时，迟早atnotimeatonetimeinnotimeallthetimekilltimekeeptimeatatimeattimestakeone'stimeontime绝不曾经，一度立刻一直消磨时间（钟表）走的准每次有时，常常从容进行按时prevent...from阻止eg：什么也不能阻止他回家。Nothingcanpreventhimfromgoinghome.扩展：savesb.fromsth救助某人于某事freesb.from是某人免受defendsb.from保卫某人免受protectsb.from保护某人免受prohibitsb.from禁止某人做某事ReadingPart2haveachancetoexplaintobeoffmakeatrippush...backintofallbackintocheerupbefarfromcomeonstepforwardnowthatgetthehangofenjoyoneselfbreakoutfalloverpull托，拉，拔pulloutofpulldownpulluppullapartpullawaypullinpulloffpullonpullover拔出，取出拆毁停下拉开，使某人不开心开走，驶离到站，进站匆忙脱衣、鞋随便穿上在路边停下语法习题练习一Itisuncertain_____sideeffect(副作用)themedicinewillbringabout,althoughabouttwothousandpatientshavetakenit.A.thatB.whatC.howD.whetherBItisobvioustothestudents_____theyshouldgetwellpreparedfortheirfuture.A.asB.whichC.whetherD.thatD语法提炼1that引导的主语从句（1）It+be+adj.+that从句eg：Itisobviousthat...（2）It+be+n.词组+that从句eg：Itisapitythat...（3）It+be+过去分词+that从句eg：Itwasreportedthat...（4）It+不及物动词+that从句eg：Ithappenedthat...常用例子名词词组常见例子：nowonder/anhonour/agoodthing/apity/nosurprise/afact不及物动词常见例子：seem/turnout/appear/happen习题练习二Itisnotimmediatelyclear_____thefinancialcrisiswillsoonbeover.A.sinceB.whatC.whenD.whetherD语法提炼2whether/if引导的主语从句（如果引导it形式主语，if可引导主语，放在句末；如果从句放在句首，不用if，而用whether引导）区别：1、但提出两种选择或与ornot连用，常用whether2、若宾语从句为否定结构，用if，不用whether3、discuss后只能用whether4、whether可用在介词之后，或带to不定式前，而if不可以5、whether可引导主、表、同从句，而if不能