冀教版英语八年级下unit4 lesson30课件

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1、Lesson30KeeptheCandleBurning!Ⅰ.Learningaims:◆知识目标Masterthenewwords:match,light,burn,useup,shallow,candleholder,oxygen,one-fifth2)Theimportantsentences:①Fillthedishhalffullofwater.②Asthecandleburns,itusesupoxygenintheair.③Thereisaboutone-fifthoxygenintheai

2、r,sothewaterrisesandfillsaboutone-fifthofthejar.Ⅱ.教学重点：1.DescribeandexplaintheexperimentinEnglish.2.分数的表达法Ⅲ.教学难点:DescribeandexplaintheexperimentinEnglish.◆能力目标：candescribeandexplaintheexperimentinEnglish◆情感目标：Cultivatethespiritoflovingscience.预习早知道1.match

3、(pl)----__________light(过去式）___________(过去分词）____________________burn（过去式）___________(过去分词）________v.燃烧useupone--fifthshallow(反义词）________half(pl)______matchesn.火柴;比赛lighted/litlighted/litv.点燃;使燃烧/照亮;使光明burned/t用完；用光；五分之一burned/tdeephalvesLookandLearn1.Wh

4、atarethey?Theyare________Theyareusedto_______something.Iwillusethem________acandle.Iam_______thecandlewiththematch.Myfatheroftenusesmatches_______hissmoke.2.Thisafternoonwe’llhaveabasketball_______.matcheslighttolightlightingtolightmatchLookandLearn-----B

5、ecauseburningneeds_______.whenthecandlestopsbuirning,ithas_______alltheoxygeninthejar.(______:Theyhave_______allthewater.)What’sthis?It’sa______.It’sa_______candle.IfIputthejarovertheburningcandle,whatwillhappen?----Itwillgoout/stop_______why?candleburnin

6、gburningoxygenusedupuseupusedup一.自主探究，合作学习1.He_____thespoon____thebowl.他把汤匙放到了碗里面。2.Lily_____thebottle____water.Lily把瓶子装满了水。3.Theroom___________________smoking.屋子里充满了烟。4.Pleaseputthejar_____thecandle.请把罐子放到蜡烛的上面。5.Mymother________hermoneytobuyclothingyest

7、erday.我妈妈昨天买衣服花光(用光）了她身上所有的钱。6.Inourclass,______studentsareboys,______studentsaregirls.在我们班，三分之二的学生是男生，三分之一的学生是女生。二.小组合作操练，用上述新知识点造句，并在小组内核对，交流。putinfilledwithisfullof/isfilledwithoveruseduptwo-thirdsone-third点拨ComepareandFindOne-fifthfour–fifthsone-third

8、two-thirds分数表达法分子基分母序分子大于1分母加S1/54/51/32/3基数词序数词分子分母5/9Practise1/4one-fourth3/7three-sevenths.Thereisaboutone-fifthoxygenintheair,sothewaterrisesandfillsaboutone-fifthofthejar.aquarterfive-ninths强化训练单项选择1.Thebottlei