Unit4-Weather-and-Climate(大学英语2课件)

Unit4WeatherandClimateTheWeatherinEnglandNewWords1.revealinga.发人深省的，能说明问题的构词特点：reveal(v.揭示)+ing(后缀，构成形容词、名词、动名词、现在分词等)孩子们给的答案很发人深省。Theanswersthechildrengavewereextremelyrevealing.2.middayn.正午构词特点：mid(前缀，表示“中间”)+day(n.白天，一天）我们正午出去玩了。Wewentoutatmidday.3.wintrya.冬天的，寒冷的（也可以写作wintery）构词特点：winter(n.冬天)+y(后缀，构成形容词)寒冷的天气已经造成了严重的道路交通堵塞。Thewintryweatherhascausedseveretrafficjamsontheroads.4.centigradea.百分度的，摄氏的构词特点：centi(前缀，表示“百分之一”或“百”)+grade(n.等级；刻度)水在零摄氏度结冰。Freshwaterfreezesatzerodegreecentigrade.5.densea.密集的；浓厚的这座城市被浓雾覆盖。Thecitywascoveredbyadensefog.6.laughtern.笑，笑声笑是治病的良药。Laughteristhebestmedicine.PhrasesandExpressions1.inthecourseof在...过程中，随着在工作期间我们应该互相帮助。Weshouldhelpeachotherinthecourseofourwork.2.fromnowhere突如其来，突然（出现），意外（发生）；不知从何处每当事故发生时，不知道从哪儿来的人群就围拢了过来。Everytimethereisanaccident,acrowdgathersfromnowhere.3.bytheway附带说说，随便（问一句）顺便问一下，你的朋友叫什么名字？Bytheway,what'syourfriend'sname?Translation•Heinsiststhathisbeliefistheonlyrightone.•OnlyafterIhavereceivedthereportcanIgiveyoutheexactnumbers.•I'llmeetyouat8o'clock.Bytheway,couldyouaskJohntocometoo?•Thebadnewsquicklybecamethetopicforeveryfamilyinthetown.•Atleast15peoplewererobbedinthecourseofthepastmonth.GrammarFocus动词时态(1)现在时的形式及用法1.现在简单时（一般现在时）Theskyisblue.Hisfatherwearsglasses.Whenhecomes,Iwilltellhimthetruth.2.现在进行时Look.It'sraining.We'repreparingforexams.Sheisalwayscomplainingaboutherwork.3.现在完成时Ihavefinishedmyhomework.Shehasbeenillforthreedays.I'velivedinParissince2010.4.现在完成进行时Ihavebeenwaitingforyouthewholemorning.Ithasbeenrainingforthreedays.现在完成时与现在完成进行时的区别Wehavecleanedtheclassroom.(重点在结果：现在教室很干净了)Wehavebeencleaningthehousethewholeday.(重点强调延续性：一直没有停过)