Lesson26:KeeptheCandleBurningI.Learningaims:Masterthenewwords:holder,shallow,lighter,match,examine,oxygenII.Learningimportantanddifficultpoints:1)Letthecandleburnfortwoorthreeminutes.2）Whenthecandlestopsburning,ithasusedupalltheoxygenintheair.3）Howfardoesitrise?4)Becauseaboutonefifthoftheairismadeupofoxygen,thewaterrisesandfillsaboutonefifthofthejar.LanguagePoints:词汇详解1.Whenthecandlestopsburning,ithasusedupalltheoxygenintheair.当蜡烛停止燃烧时，它就用完了空气中所有的氧气了。【用法】useup意思是“用完、用光”，这是“动词+副词”短语。这类短语用名词作宾语时，名词可用在副词前，也可用在副词后；用代词作宾语时，代词则必须用在副词前。【举例】IgaveLiMingalotofpencils,buthehasusedthemupalready.我给了李明很多铅笔，但他已经把它们都用完了。2.Becauseaboutonefifthoftheairismadeupofoxygen,thewaterrisesandfillsaboutonefifthofthejar.因为组成空气的成分大约五分之一是氧气，所以水会上升并且填充瓶子的大约五分之一。【用法】短语bemadeupof意为“由……组成”，后加名词或代词作介词宾语。【举例】Thisgradeismadeupoftenclasses.这个年级是由十个班组成的。【用法】句中的one-fifth意思是“五分之一”，这是一个分数。分数的表达一般遵循以下规则：分子用基数词，分母用序数词；当分子大于一时，分母要用复数形式；并且其中的连字符号有时可以不要。【举例】one-fourth四分之一threefifths五分之三Evaluationfeedback(测评反馈)I.从方框中选择适当的动词并用其适当形式填空。makelightwatchputburn1.Danny____________thecandlesandthenblewthemout.2.Lookatthefire.Ithaskept____________forthreehours.3.ZhangHong____________thecandlesinthecandleholderandsatdown.4._______________theobservation,Mr.Wangisworkingharddayandnight.5._______________carefullyandyou’llfindthedifferencesbetweenthetwopaintings.II.根据句意和所给的首字母提示用适当的词语填空。1.IlikescienceandIthinkitisveryi____________.2.Hecuttheappleintoh__________andletmechoose.3.IfIturnoffallthelightsinthedark.Whatwillh___________?4.Jenny,pleasefillthebottlef__________ofwater.5.Weares____________youwilllikethissubject.III.按要求进行句式转换，每空一词。1.LetherhelpyouwithyourEnglish.（反意疑问句）LetherhelpyouwithyourEnglish,___________________?2.Thecandleispink.（对画线部分提问）____________________isthecandle?3.Thebagisfullofrice.（同义句）Thebagis__________________rice.4.Shelightedthecandlewithamatch.（一般疑问句）___________________________thecandlewithamatch?教学反思：
