TheStudyofLivingThingsLesson28

LookintoScience

Unit5

課文呈現知識講解…………Lesson28TheStudyofLiving?Things詞匯聽寫課堂導入課文1結對活動課堂小結課后作業…

同學們，上一課學習的單詞你們都掌握了嗎？現在大家來檢驗一下，點擊下面的音頻開始聽寫吧！Doyoulikenature,why?InMexico，thebutterfliesalwaysreturntothesamesmallpieceofforest，whichisonly20kilometreswide?.Here,asmanyas?230millionbutterfliesspendthewinter.Theycancoversometreesalmost?completely.Thebutterfliesthatreturntothesoutharethegreat-greatgrandchildrenofthebutterfliesthatleftforthenorth.Whentheybegintotravelnorthinspring，thefemaleslayeggs.Theylayeggsononlyoneplant：milkweed.Butterfliesarebeautiful.Whatdoyouknowaboutthem?ButinMexico，peoplecutdown?thetreesthatthebutterfliesneedtorestonbecausetheywantmorelandforfarming.IntheUnitedStatesandCanada，farmersusechemicalsthatkillmilkweed.Thisworries?Dr.Tayloralot.Nowthingsareimproving.Mexicohasbeguntoprotectpartsofitsforests.TheUnitedStatesandCanadahaveencouragedfarmerstouselesschemicals.Scientistsstilldon’tunderstandhowthebutterfliesknowwhentoflysouth.Iftheyareevenafewdayslate，theywillfreeze.Andhowdoallthegreat-greatgrandchildrenfindthesameforestinMexicoeveryyear?Thisis

both

puzzlingand?interestingformanyscientists.Therearemanymysteriesyettobediscoveredbythoseinterestedinscience.Wouldyouliketostudybiology?living/'l?v??/adj.活著的

eg：Allthelivingpeopleweretakentosafety.所有活著的人都被帶到了安全的地方。講解來自《點撥》知識點1用法例句alive既可指人，也可指物，可作表語或后置定語。Thefishisstillalive.這條魚還活著。living既可用于指人，也可用于指物。在句中可作表語或定語。Heisdead，buthisparentsarestillliving.他死了，但他的父母仍然健在。Thesearealllivingfish.這些都是活魚。live

主要用于指鳥類或其他動物。Wesawalivesnake.我們看見了一條活蛇。講解來自《點撥》考向【易錯點】辨析alive，living與live

drawone’sattention

引起某人的注意

拓展payattentionto

注意講解來自《點撥》知識點2eg：It’saspecialdaytodrawpeople'sattentiontotheenvironment.它是個引起人們注意環境的特殊日子。eg：Payattentiontoyourhandwriting.注意你的書寫。典例昨天，他不同尋常的講話吸引了我們的注意。

Hisunusualspeech________________________yesterday.講解來自《點撥》drewourattention

20kilometreswide

20千米寬

考向講解來自《點撥》知識點3表示長、寬、高等用“基數詞＋單位詞(metre，foot，inch等)＋形容詞(long，wide，high等)”或者用“基數詞＋單位詞＋in＋名詞(length，width，height等)”。eg：Thewallis20metreslongand2metreshigh.＝Thewallis20metresinlengthand2metresinheight.這堵墻20米長，2米高。典例這座建筑30米高。Thebuildingis________________________.【點撥】“基數詞＋單位詞(metre，foot，inch等)＋

形容詞(long，wide，high等)”可用來表示長、寬、高。30metreshigh

講解來自《點撥》

asmanyas意為“多達……，和……一樣多”，修飾可數名詞復數。

講解來自《點撥》知識點4eg：Thereareasmanyastenthousandbirdsintheforest.這個森林里有多達一萬只的鳥。as…as…和……一樣。中間用形容詞或副詞的原級。否定形式中，前面的as也可用so,即notso/as…as意為“不如……”。eg：IthinkEnglishisasimportantasChinese.我認為英語和漢語一樣重要。Youaren’tas/sotallasyourbrother.你沒有你弟弟高。

考向講解來自《點撥》典例Steveisn’tas________asKelly.Heoftenmakesmistakesinhiswriting.(浙江麗水)A．careless

B．tidyC．carefulD．difficult【點撥】根據句意可知，Steve不如Kelly仔細，他經常在書寫方面犯錯誤。as…as中間應該用形容詞或副詞的原

級。故選C。C

講解來自《點撥》

almost/'??lm??st/adv.幾乎，差不多考向講解來自《點撥》知識點5eg：Ialmostmissedmytrain.我差點錯過了火車。辨析almost與nearly

almost和nearly這兩個詞都表示“幾乎”，“差不多”的意思，在不少場合可以互換使用，但有以下區別：相同點不同點

nearly意思相近，肯定句中可以換用。nearly可以和not連用，notnearly是“遠不”的意思，但almost不和not單獨連用。Themoneywillnotbenearlyenoughformyjourney.這些錢遠不夠我旅行用。

almostalmost能和never，no，none，nothing，nobody等詞連用，這種情況下不能用nearly。講解來自《點撥》典例用almost或nearly的適當形式填空。1．Therewas________nosnowthatwinter.2．Weare________________there.3．Thespeakersaid________nothingthatwasworthlisteningto.4．________________allthestudentslefthereafewminutesago.almost講解來自《點撥》nearly/almostalmost

Almost/Nearly

cutdown砍倒，縮減

講解來自《點撥》知識點6eg：Theycutdownthebigtree.他們把這棵大樹砍倒了。You’dbettercutthearticledowntoabout500words.你最好把這篇文章壓縮到五百字左右。與cut有關的短語有：cutin

打斷(談話)，插嘴eg：Don’tcutinwhenothersaretalking.當別人正在講話時不要插嘴。Iwasjustcomingtothatpointwhenyoucutin.

我剛要談那一點，你就打斷我了。cutoff

切斷，斷絕 eg：Thefloodcutthevillagersofffromtherestoftheworld.洪水切斷了村民與外界的聯系。考向講解來自《點撥》Hecutoffabranchfromthetree.他從樹上砍下了一根樹枝。cutout

刪除，停止做(或使用、食用)eg：I’vebeenadvisedtocutsugaroutofmydiet.

有人勸我飲食要忌糖。Icutoutoneparagraphinthisarticle.我刪除了這篇文章的一個段落。講解來自《點撥》典例政府告知我們不要砍倒這些樹。Thegovernmenthastoldus______________________________thetrees.【點撥】cutdown砍倒，tellsb.nottodosth.告訴某人不要做某事。

講解來自《點撥》tocutdownnot

worry/'w?ri/n.煩惱，憂慮v.擔心，擔憂

考向一講解來自《點撥》知識點7eg：Don’tworry.Iknowhowitturnedout.不要擔心。我知道事情怎樣發展。worry作及物動詞，構成結構：worrysb.

使某人擔心。eg：Ididn’twanttoworrymyfriend.

我不想使我的朋友擔心。考向二worry作不及物動詞，常構成：Don’tworry.“不要擔心。”；worryaboutsth./sb.“擔心某事/某人”。eg：Don’tworry.He’llbeallright.別擔心。他會平安無事的。Thechildhasnothingtoworryabout.這個孩子沒有什么可擔心的。講解來自《點撥》

考向三worriedadj.擔心的beworriedaboutsb./sth.擔心某人/某事eg：Don’tbeworriedaboutme.Icanlookaftermyself.不用擔心我。我能照顧自己。講解來自《點撥》

both…and………和……都

考向講解來自《點撥》知識點8both...and,neither...nor與either...or

的區別。both...and...表示“……和……都”，是指兩者兼而有之，連接兩個并列成分作主語時，謂語動詞要用復數形式。neither...nor表示“既不……也不”，指兩者都不，連接兩個并列成分作主語時，謂語動詞跟最鄰近的主語保持人稱和數上的一致。either...or

表示“或者……或者”或“不是……就是”的意思，是指兩者中的一個，它連接兩個并列成分作主語時，謂語動詞跟最鄰近的主語保持人稱和數上的一致。講解來自《點撥》典例1.Youcantake________thispen________thatpen,butyoucan’ttakeboth.2．________Lily________Tomwillcomethisafternoon,becausetheyareverybusy.3．ShehaslearnedEnglishandChineseforyears，soshecanspeak________English________Chineseverywell.either講解來自《點撥》Neitherbothor

norand

carry/'k?ri/v.攜帶，搬運講解來自《點撥》知識點9eg：Letmecarrytheboxforyou.讓我替你搬這個箱子吧。Shecarriedherbabyinherarms.她懷里抱著她的寶寶。用圖片表示bring，take與fetch的區別為：講解來自《點撥》拓展IaskedLilytofetchmeanEnglishbook，butshebroughtmeaChinesebook，soIaskedhertotakeittotheteacher’soffice.我讓莉莉去給我取一本英語書，她卻給我拿來了一本語文書，于是我讓她把它拿到老師的辦公室。魔法記憶講解來自《點撥》1.Readthelessonandcompletethetable.Fantasticfactsaboutbutterflies·Thebutterfliesalways________tothesamesmallpieceofforestand________thewinterthere.·Thebutterfliesthatreturntothesoutharethegreat-greatgrandchildrenofthebutterfliesthatleftforthenorth.·Thefemales________eggsononlyoneplant：milkweed.

return

spend

lay

Let'sDoIt!Thingsthatscientistscan’tunderstand·Howdothebutterfliesknowwhentoflysouth？·Howdothegreat-greatgrandchildrenofthebutterflies________thesameforest？findThingsthatDr.Taylorworriesabout·InMexico，peoplecutdownthetreesthatthebutterfliesneedto______on.·IntheU．S.andCanada，farmersusechemicalsthat______milkweed.restkill

2.Jointhesentencestomakeattributiveclauses.Example：Wedidsomeexperimentsyesterday.Theexperimentswerefantastic.Theexperimentsthatwedidyesterdaywerefantastic.Let'sDoIt!1．Iaskedhimtomailtheletter.Iwrotethelettertomycousin.___________________________________________________2．YesterdayImetaboy.Theboyisanewmemberinourartclub._________________________________________________3．Marywascarrying?abag.Thebagcostheralotofmoney._________________________________________________4．Footballisateamsport.Footballispopularallovertheworld._________________________________________________IaskedhimtomailtheletterthatIwrotetomycousin.YesterdayImetaboywhoisanewmemberinourartclub.

Marywascarryingabagwhichcostheralotofmoney.Footballwhichispopularallovertheworldisateamsport.

3.Workingroupsofthreetoplayagame.Tasktips：Eachgroupshouldpreparesomepiecesofpaperanddividethemintothreecolumns.StudentAwritesaperson’snameinthefirstcolumn，foldsthepaperandpassesittoStudentB．StudentBwritesastatementbeginningwith“who”，foldsthepaperandpassesittoStudentC．StudentCmustfinishthesentenceandreaditoutloud.Example：Mr.Brown

whoisabiologist

willgiveusatalkLet'sDoIt!一、根據句意及漢語提示完成單詞1．Doyoulike________(生物學)atschool?2．Look!Therearemany___________(蝴蝶)amongtheflowers.3．Thisisa________(極好的)film.4．I___________(完全地)forgotaboutit.5．Manypeople________(遷移)toCanadainthe1800s.來自《點撥訓練》biologybutterfliesfantastic

completelymigrated來自《點撥訓練》二、單項選擇6．Ourteacheroftenencourageshim________hard.

A．workB．workingC．toworkD．works7．Sinceenvironmentistooimportanttoallofus,wehumanbeingshadbetter________fewertrees.A．turneddownB．cutdownC．putdownD．cutupCB來自《點撥訓練》8．Look!Mydogis________onthegroundinthesun.A．lieB．layC．laidD．lying9．(呼和浩特)Thephoto________takenbymybrotherlastw