外研四下Unit4Plantlife复习课件

Unit4Plantlife单元重难点梳理外研（三起）四年级下12345单词，词组过关重点句型过关语音过关语法过关专项练习Listenandchant1单词，词组过关stem/stem/（植物的）茎，梗，柄seed/siːd/根leaf/liːf/叶，叶子（复数leaves）/ruːt/种子root1单词，词组过关sunflower/ˈsʌnflaʊə(r)/向日葵Thesunflowergrowsintheearth.向日葵生长在泥土里。/ɜːθ/泥土，土壤earth1单词，词组过关wheat/wiːt/小麦Heiswateringthewheat.他正在给小麦浇水。1单词，词组过关cotton/ˈkɒtn/棉花，棉株Shewantstopickcotton.她想要摘棉花。1单词，词组过关cabbage/ˈkæbɪdʒ/卷心菜，洋白菜Doyoulikecabbage?你喜欢卷心菜吗？1单词，词组过关mouse/maʊs/老鼠（复数形式：mice）Iamafraidofmice.我害怕老鼠。1单词，词组过关grain/ɡreɪn/谷粒Wegetgrainfromplants.

我们从植物身上收获谷物。1单词，词组过关paper/ˈpeɪpə(r)/纸Mybookismadeofpaper.我的书是纸做的。1单词，词组过关dig/dɪɡ/挖，掘Whyareyoudiggingthere?你为什么在那边挖（土）？1单词，词组过关sleep/sliːp/睡，睡觉Isyourcatsleepingnow?你的小猫正在睡觉吗？1单词，词组过关miss/mɪs/想念，思念，怀念（某人）Imissmygrandmaverymuch.我非常想念我的奶奶。1单词，词组过关will/wɪl/将，会，要（用于构成将来时）Hewillbe18yearsoldtomorrow.他明天18岁了。1单词，词组过关life/laɪf/生活Myschoollifeishappy.我的学校生活很开心。1单词，词组过关everything/ˈevriθɪŋ/每件事物；所有事物IseverythingOK?一切都还好吗？1单词，词组过关thin/θɪn/细的，瘦的Heisverythin.他很瘦Phrasesintheearth在泥土里 growup长大sunflowerseeds向日葵种子 waterthewheat给小麦浇水pickcotton摘棉花 staywith和……待在一起riceplant水稻 cometrue实现Lookandsayseedsunflowercabbageliferootleafearthstemwheatgrainmousecottonpaperdigsleepmisswillthineverything2重点句型过关Whataretheydoing?Theyaredigging.1.询问某人正在做什么-Whatare+主语（复数）+动词-ing形式?-We're/They’re+动词-ing形式（+其他）.2重点句型过关Arethebananasgettingyellow?No,theyaren’t.2.确认某些事物的动态Are+某些事物+动词-ing形式(+其他)?Yes,theyare./No,theyaren’t.2重点句型过关Whydon'tSam'sseedsgrow?Because...3.询问某种情况没有发生的原因Whydo/doesnot+主语+动词原形(+其他)?答句通常为由because引导的从句点击图片进入练习环节3语音过关e/i://i:/是长元音，发音时声带振动。舌尖抵下齿，舌前部尽力向口腔上壁抬起。双唇微微张开，呈扁平口形。heshewemebe4语法过关语法一：动词-ing形式的变化规则变化规则例词一般情况下，直接在动词词尾加-ing以不发音的字母e结尾的动词，先去掉e，再加-ing以重读闭音节结尾且末尾只有一个辅音字母的动词，双写末尾辅音字母，再加-ingplant-plantingact-actingmake-makingride-ridingswim-swimmingrun-runningdig-digging4语法过关语法二：Howmany,Howmuch,Howoften的用法区别1.howmany意为“多少”，后接可数名词复数，用来询问可数事物的数量。2.howmuch①

意为“多少”，后接不可数名词，用来询问不可数事物的量；②

意为“多少钱”，用来询问价格。3.howoften意为“多久”，用来询问频率。一般用once,twice,threetimesaday/week/month/year...等表示频率的词来回答。4语法过关语法三：

情态动词will的用法用于构成将来时，没有人称和数的变化，后接动词原形。结构：主语+will+动词原形(+其他)；否定形式：willnot=won'te.g:Ithinkhisdreamwillcometrue!Trusthim!Hewon’tbelateforschooltomorrow.5专项练习一、判断句中单词画线部分发音是（T）否（F）相同。（

）1.Hewantscorn,butshewantscarrots.（

）2.Yummyfoodcomesfromplants.Everythingissogood.（

）3.Wow!Thestemisred.（

）4.Plantscanhelpusgrow.Weneedthem.（

）5.Thesebeansaregreen.Iwanttoeatthemforbreakfast.TFTFF二、选择合适的内容补全句子。1.These__________(seeds/seed)can’tgrow!2.Everything__________(is/are)sogood.3.Yourdadis__________(makes/making)agardenforyourfamily.4.Thankyoufor__________(helping/help)usgrow!5.Weusetomatoes__________(cook/tocook)noodles.seedsismakinghelpingtocook三、MsSmart带着同学们一起来到了菜园。根据情境，选择合适的选项补全对话。A.Sam,areyoudiggingthepotatoes?B.Ourfoodcomesfromplants.C.Canweeattheleaves?D.Whatisthemandoing?E.Iwantsometomatoes.MsSmart:Children,look!Thevegetablesinthegardengrowwell.LiMing:1.________MsSmart:Heiswateringthevegetables.Lookatthepotatoes.Whatpartcanweeat?LiMing:2.________MsSmart:No,wecan't.Wecaneattheirstems.Fangfang:3.________Sam:Yes,Iam.MsSmart:Plantsareuseful.4._______Whatdoyouwant?Fangfang:5.________DCABE四、看西红柿的生长过程，判断正（√）误（×）。Howdoesthetomatogrow?Day1Day7-10Day30-50Day50-70Day90-120“Iamaseed”“Iamsmallandgreen”“Iamtallandgreen”“Now,Iamayellowflower”“Igrowup,peoplepickmeup.”ThingsIneed:air,water,soil,sunlight(1)OnDay7,thetomatoisaseedandsays"Iamaseed."（

）(2)Whenthetomatois45daysold,itistallandgreen.