初三英語第十八單元Planting trees 植樹

          發布時間:2017-11-17 編輯:互聯網 手機版

          內容

          一、教法建議

          【 拋磚引玉 】

          單元雙基學習目標

          Ⅰ. 詞匯學習

          plant , wonderful , dig , deep , stick , tie , diagram , forest , copy , million , towards , mountain , harvest

          neither…nor , knock…into… , next to , so that , cut down , millions of , stop…from doing sth , blow…away , not only…but also… , in a few years' time , far away , thanks to

          Ⅱ. 句型學習

          Tie the tree to the top of the stick to keep it straight .

          The more , the better .

          The river near here is over four metres deep .

          The Great Green Wall is between 400 and 1 700 kilometres wide .

          Trees must be watered well .

          The earth should be pushed down hard .

          More or less !

          While you're doing that I'll go and get some water .

          Ⅲ.語法學習

          1 ) 含有情態動詞的被動語態的構成及用法。

          2 ) 計量的表達。

          Ⅳ. 交際英語

          如何讓別人做某事。

          【 指點迷律 】

          單元重點詞匯點撥

          1 . plant 1 ) 種植 ( 動詞 ) 2 ) 植物 ( 名詞 )

          We planted some roses in the garden .

          April is the time to plant trees .

          They are planting vegetables .

          [點撥]plant 還可作“工廠”講。

          2 . wonderful 極好的;精彩的 ( 形容詞 )

          That's a wonderful idea .

          What a wonderful invention !

          He told me a wonderful story .

          [點撥]have a wonderful time 過得極為愉快。

          3 . neither ( 兩者 ) 都不

          [點撥]1 ) ( 兩者 ) 都不的 ( 形容詞 )

          Neither watch works , they are both broken .

          [注意]neither 作形容詞只能與單數名詞或代詞連用。

          2 ) ( 用于否定句 ) 也不 ( 副詞 )

          John won't go , and neither will I .

          He cannot swim , neither can his brother .

          You did not see him , neither did I .

          3 ) ( 常和 nor 連用 ) 也不 ( 連詞 )

          It is neither blue nor green .

          Neither you nor I am right .

          4 ) ( 兩者 ) 都不 ( 代詞 )

          Neither of them is good health , but they work hard .

          Neither of the stories was true .

          [點撥]neither…nor…連接的兩個并列成分作主語時,謂語的單復數符合就近一致原則。如:Neither you nor he is kind .

          4 . nor 也不 ( 用在 neither , nor , not , never 等否定詞之后 ) ( 連詞 )

          I have neither brothers nor sisters .

          I didn't go , nor did they .

          He doesn't want to go there , nor do I .

          5 . dig 挖,掘 ( 動詞 )

          They have started digging their potatoes .

          He was digging a hole .

          The truth was dug out .

          [點撥]dig 的過去式,過去分詞,現在分詞分別為 dug , dug , digging。

          6 . hole 洞;坑

          The boat has a hole in each side .

          Please fill the hole in my tooth .

          7 . deep 深的,深厚的,深色的 ( 形容詞 )

          There is a deep well in our village .

          This river is not very deep .

          Her coat is deep red .

          The old man had a deep love for the Party .

          [點撥]be deep in a book 埋頭讀書。talk deep into the night 談到深夜。deep 常用于具體的深度,包括時間和空間。deeply 用于抽象的、比喻的“深”。

          8 . earth 土;泥;地球;大地

          Mother planted flowers in the earth .

          The earth is bigger than the moon .

          9 . tie ( 用繩、線等 ) 系;扎;拴 ( 動詞 )

          The boy tied the dog to the tree .

          They tied him with cords .

          I am tied to my work all day .

          [點撥]tie sth to… 把……系 ( 拴 ) 在……tie sth , with sth . 用……系 ( 拴 ) … 10 . water 澆水、灌溉 ( 動詞 )

          They are watering flowers in the garden .

          They are watering the streets .

          [點撥]water 作抽象名詞和物質名詞表示一般概念時前面通常不用冠詞,只有當它被一個限制性定語修飾時才加冠詞。

          11 . untrue 不真實的;假的 ( 形容詞 )

          It is an untrue story .

          He is untrue to his friends .

          [點撥]untrue 是由形容詞 true 加前綴 un - 構成的。

          12 . forest 森林

          Most part of the country is made up of forest .

          They travel in the forest once a year .

          [點撥]forest 指占地廣大,而人跡稀少,有鳥獸棲息的森林,而 wood 指樹林,人工培植林,或已開發的林子。

          13 . sand 沙;沙子;沙灘

          A child likes to play with sand .

          The children are playing games on the sands .

          [點撥]sand 作“沙,沙子”講是不可數名詞,當“沙灘”講是可數名詞。

          14 . copy 照搬;謄寫;模仿 ( 動詞 )

          Copy the sentence down .

          He copied a page of the book .

          Copy this down in your notebook .

          I want you to copy carefully from this model .

          [點撥]Copy in the examination 考試作弊,Copy down 記下,抄下。

          15 . northern 北方的;北部的 ( 形容詞 )

          The northern part of our country is very cold in winter .

          [點撥]northern 無比較等極形式,類似的還有:southern 南方的,eastern 東方的,western 西方的。

          16 . million 百萬;百萬個 ( 人或物 )

          There are more than five million people in this city .

          Millions of people went to the streets to welcome the king .

          [點撥]million 前如有數詞,million 則不加 s , 如加了s 后必接 of。

          17 . toward ( s ) 向;朝;對于 ( 介詞 )

          A group of students are walking toward ( s ) she sea .

          She was walking toward ( s ) town when I met her .

          [點撥]在后跟人時,towards含有“態度性”。如:

          Is he friendly towards her ?

          What are his feelings towards us ?

          18 . among 在……之中 ( 介詞 )

          She was sitting among her children .

          I found him among the crowd .

          There is a small house among the trees .

          [點撥]among 表示三者或三者以上的之間。

          19 . mountain 山;山脈

          It is difficult to get to the top this mountain .

          They are climbing the mountain .

          The mountains were covered with snow .

          [點撥]in ( the heart of ) mountains 在 ( 深 ) 山中,a mountain of difficulties 困難重重。

          20 . grow

          ①種植;栽培 ( 及物動詞 )

          In early spring we grow trees around our house .

          ②生長,成長 ( 不及物動詞 )

          Plants cannot grow without water .

          The rice is growing fine .

          He has grown into a fine young man .

          ③發展,增長 ( 不及物動詞 )

          They city is growing fast .

          The population is not growing so fast in this area .

          [點撥]grow 的過去式,過去分詞為 grew , grown . grow 還可作系動詞用,后接形容詞作表語,grow up 長大,成人。

          單元詞組思維運用

          1 . neither…nor 既不……也不

          He is neither Japanese nor Chinese .

          Neither he nor I know that .

          [注意]當它用來連接兩個主語時,其謂語動詞的形式取決于后一個主語的人稱。試比較:

          Neither you nor I am right .

          Neither you nor he is right .

          Neither he nor you are right .

          2 . knock…into 把……插進;把……敲進

          Knock a long , strong stick into the earth next to the hole .

          A long stick must be knocked into the earth .

          Knock the nail into the wall , please .

          3 . make sure 務必;查明;弄確實

          Make sure that it is straight .

          Make sure that all the windows are closed .

          Make sure you get there on time .

          I think there is a train at 5 : 15 , but you'd better make sure .

          Have you made sure of the time of the train ?

          4 . in a few years' time 幾年之后

          In a few years' time , we hope to cover those mountains , too !

          [注意]in… 's ( s' ) time , 表示“在某時間之后”,又如:

          She is going to Beijing in three days' time .

          I'll be back in a week's time .

          He will be back in an hour's time .

          He has promised to pay me in three months' time .

          5 . tie…to 把…捆在 ( 拴在 ) ……

          He tied the horse to the tree .

          They tied the bad to the big tree .

          When he woke up , he found himself tied down to the ground .

          6 . be just right 正合適,合適的。

          The weather is just right for travelling .

          This book is just right for reading .

          7 . stop…from doing 制止……不使……;阻止

          It will stop the sand from moving towards the rich farmland in the south .

          The Great Green Wall will stop the wind from blowing the earth away .

          8 . point to ( point at ) 指向,指引

          He points to the high mountains far away .

          He pointed the way to the bookstore ( station ) .

          He pointed to ( at ) the forest .

          9 . far away 遙遠

          The moon is far away from the earth .

          She lives far away .

          10 . thanks to 由于,幸虧,多虧

          Thanks to the doctor , I am well again .

          Thanks to John's kind help , we finished it early .

          11 . more or less 或多或少,大約

          He knows some English more or less .

          It is helpful more or less .

          They were more or less hungry .

          The bicycle costs $100 more or less .

          12 . be covered with 覆蓋著,盡是

          The table is covered with a cloth .

          The mountains were covered with snow .

          The trees are covered with flowers .

          二、學海導航

          【 學法指要 】

          單元句型思路明晰

          1 . so that 引導狀語從句的句型

          Put the tree in the hole so that it is straight . 把樹放在洞內,讓它立直。

          [明晰]so that 的意思是“以便,為了”,引導一個目的狀語從句。又如:

          We got up very early so that we could catch the train .

          I ran very fast so that no one should catch up with me .

          Close the door so that it is warm is the room .

          2 . 現在進行時的被動語態句型

          Today , too many trees are still being cut down it the USA . 在美國,今天還

          有大量的樹在被人們砍伐著。

          [明晰]句中的 are being cut down 是現在進行時的被動語態。又如:

          More Great Green Walls are being built all over the world .

          The TV set is being repaired right now .

          3 . the + 比較級,the + 比較級

          The more , the better . 越多越好。

          [明晰]①“the + 比較級,the + 比較級”,意思是“越……越……!庇秩纾

          - What size box do you want ?

          - The bigger , the better .

          Ask all of them to the party , the more , the better .

          The more carefully you do the experiment , the better .

          Start your work . The sooner , the better .

          ②“the + 比較級,the + 比較級”的完整句式是“the + 比較級 + 主 + 謂,the + 比較級 + 主 + 謂”,如:

          The more people you know , the less time you have to see them .

          The more I gave him , the more he wanted .

          The more he eats , the fatter he gets .

          The harder you work , the more you will learn .

          The earlier we start our work , the sooner we can finish it .

          4 . 表示計量的句型“數詞 + 名詞 + 形容詞”

          The Great Green Wall is 7 . 000 kilometres long , and between 400 - 1 , 700 kiiometres wide . 綠色長城長7000公里,寬400至1,700公里。

          [明晰]表示計量的句型的常用結構形式:

          “主 + 謂 + 數詞 + 表示單位的名詞 + 形容詞”用來表示“某物有多長 ( 寬、深、高 ) 等,又如:

          The wall is three metres high .

          The stick is five inches long .

          The boy is eight years old .

          單元難點疑點釋疑

          1 . Come to school in your old clothes tomorrow ! 明天你穿舊衣服到學校來。

          [釋疑] ( 1 ) 句中的介詞 in 可表示服飾的穿著。例如:

          Do you know the girl in the hat ?

          He is often in brown .

          What shall I go in ?

          2 . It's Tree Planting Day . We're going to plant some trees .( 明天是 ) 植樹節,我們將種一些樹。

          [釋疑]plant 一詞還可用作名詞,意思是“植物”。例如:

          There are different kinds of plants on that farm .

          Plants can bring us much fresh air . 植物可帶給我們大量新鮮的空氣。

          3 . Really ? Wonderful !

          [釋疑] ( 1 ) wonderful 常用于對事物的贊嘆、稱許及驚訝,用以表達說話者分外驚奇的心情。在口語中使用時相當于great . 例如:

          It's wonderful that you have won the football match .

          His uncle is a wonderful maths teacher .

          ( 2 ) wonderful 是在名詞 wonder ( 驚奇,奇跡 ) 后加上 -ful 構成的形容詞,常見的還有:use - useful , help -helpful, care-careful, beauty -beautiful

          4 . HOW TO PLANT A TREE 如何種樹

          [釋疑] ( 1 ) 英語中用作標題的文字,一般常用大寫。

          ( 2 ) 不定式前面常?梢愿鶕馑嫉男枰c疑問副詞或疑問代詞一起構成短語

          We don't know when to go there .

          The problem is where to plant trees .

          We were not sure what to do at that time .

          5 . The ground must be just right - neither too wet nor too dry . 地面必須剛好適宜 , 既不太潮濕也不太干燥。

          [釋疑] ( 1 ) neither…nor…連詞,“既不……也不……”之意。分別放在兩個平行的述說對象的前面。例如:

          He is neither tall nor short .

          I can neither sing nor dance .

          Neither you nor he knows French .

          上面句中的謂語動詞形式取決于后一個主語的人稱,這一點要特別注意。請比較:

          Neither he nor you know French .

          ( 2 ) neither 一詞單獨使用時,可作副詞或代詞,意為“ ( 兩者 ) 都不”,下列句中的名詞或動詞應用單數形式。例如:

          Neither answer is right .

          Neither of them knows me .

          6 . Knock a long strong stick into the earth next to the hole . Make sure that it is straight . 把一根又長又結實的木棍順著洞邊插進土里,一定要把它立直。

          [釋疑] ( 1 ) knock…into… “把……插進……;把……敲進……”。例如:

          Please help me knock the nail into the wall .

          ( 2 ) next to “挨著”。例如:

          His bedroom is next to mine .比較:

          He lives in the next bedroom .

          Next to our school is a big lake .

          Who sits next to you ?

          ( 3 ) make sure “查明,弄確實”。例如:

          You must make sure that he didn't lie .

          It's hard for me to make sure whose handwriting is better .

          7 . Put the tree in the hole so that it is straight . 把樹放在洞內,讓它立直。

          [釋疑]so that 意為“以便”,“為了”,引出一個表示目的的狀語從句。又如:

          He gets up early in the morning so that he can catch the early bus .

          Close the door so that it is warm in the room .

          8 . Tie the tree to the top of the stick to keep it straight . 把樹和木棍的頂端捆好,以保持樹能直立。

          [釋疑] ( 1 ) tie…to…“把……捆在……”。例如:

          They tied the bad man to the big tree .

          Tie his hands to the back of the chair .

          to keep it straight 是動詞不定工,在句中作狀語,表示捆樹的目的。straight 是賓語 it 意義上的補充和延伸,所以叫做賓語補足語。又如:

          We always keep our classroom clean .

          Don't touch the machine . You must keep yourselves safe .

          ( 3 ) 在句中常用來作賓語補足語的還有動詞不定式、分詞、名詞等。例如:

          We all call him Lao Wang . 我們都叫他老王。

          Who helped you to wash these clothes ?

          I saw him going into the office when I came back last night .

          9 . Water it well , as often as possible . 盡可能經常地給樹澆好水。

          [釋疑] ( 1 ) water 可用作動詞,意為“給……澆水”。

          英語中有些表示物質的名詞也可用作動詞,試比較下列句中 fish 及 rain 的詞性。

          He likes to fish on Sunday . But he doesn't like eating fish very much .

          We had much rain last month , but it hasn't rained these days .

          ( 2 ) 類似 as often as possible 的說法還有:

          as soon as possible 盡可能的快 ( 指時間 ) , as fast as possible 盡可能的快 ( 指速度 ) ,as more as possible 盡可能的多, as early as possible 盡可能的早

          10 . Why was the Great Green Wall built ? 為什么要營造綠色長城 ?

          [釋疑] ( 1 ) The Great Green Wall 指的是三北防護林,即:西北、東北和華北。

          整個防護林橫貫十三省、市、自治區。

          ( 2 ) 該句為一般過去時被動語態。

          11 . In 1850 , about a third was covered by forests . 1850年,大約三分這一 ( 的美國國土 ) 被森林覆蓋。A third 即為 one third 或 1/3。

          [釋疑]英語中分數的文字表達,分子用基數詞,分母用序數詞,先讀分子,后讀分母。當分子大于1時,分母用相應的復數。例如:2 / 3 讀作 two thirds . 5 / 7 讀作 five sevenths .

          12 . A lot of good land has gone with them , leaving only sand . 大片的肥沃土壤隨著森林的消失而流失,只留下一片荒沙。

          [釋疑] ( 1 ) leaving only sand 在句中作狀語,表示土壤流失后的景象。

          ( 2 ) leave 常用的兩個意思為“離開”及“留下”。請比較下面兩個句子:

          The mother left the baby and hurried to work .

          Don't leave your baby along in the room .

          13 . Today , too many trees are still being cut down it the USA . 如今,在美國,大量的樹木仍遭砍伐。

          [釋疑]句中的 are being cut down 是現在進行時的被動語態。

          14 . China does not want to copy the USA's example . 中國不愿意步美國的后塵。

          [釋疑]copy 在此意為“照抄”,“照搬”。例如:

          Copy a drawing . 臨摹圖畫。

          He is copying the sentences on the blackboard .

          15 . The Great Green Wall will stop the wind from blowing the earth away .

          [釋疑]stop…from doing sth . “阻止……以免……”,“防止……做某事”。

          I have often stopped myself from doing something wrong .

          You must stop that big dog from coming into the house .

          16 . They must be built all over world . 全世界都必須營造綠色長城。

          [釋疑]含情態動詞的被動語態結構:情態動詞 + be + 過去分詞,又如:

          This work must be finished in a week .

          The trees should be watered often .

          In south China , rice may be harvested three times a year .

          17 . Many thousands of trees must be planted every year . 每年都得裁成千上萬株樹。

          [釋疑] ( 1 ) many thousands of“數千;萬千上萬”,thousand 在此是名詞。又如:hundreds of 好幾百, millions of 數百萬

          ( 2 ) hundred , thousand , million 也常常用作數詞,此時后面不能加 s。例如:

          We've learned about eight hundred English words .

          That farmer had over five thousand ducks .

          18 . The more , the better . 越多越好。

          [釋疑]這種句式的結構為:“the + 比較級,the + 比較級”,意為“越……越……”。請看:

          Ask all of them to come to the party . The more , the better .

          Start your work . The sooner , the better .

          The more I think of it , the happier I am .

          The harder you work , the greater progress you will make .

          19 . This year alone , we've already planted ten thousand trees . 僅僅在今年,我們已經裁了一萬棵樹。

          [釋疑]alone 是形容詞,在句中意為“僅僅”。又如:

          The people live by bread alone .

          We all think that he alone can do it .

          20 . But we're growing a lot more now , thanks to the Green Wall . 然而,幸虧有了綠色長城,我們現在種植了更多的糧食作物。

          [釋疑]thanks to…構成副詞短語,意為“幸虧”,“由于”例如:

          Thanks to their help , we won the match .

          We arrived at the railway station in time , thanks to that bus driver .

          21 . Is it straight ? More or less . 樹放直了嗎 ? 基本上是直的。

          [釋疑]more or less “或多或少,差不多”。例如:

          What he said is more or less true .

          22 . 同義詞 wear , dress , in , put on , try on 的區別

          [釋疑] ( 1 ) wear ( 穿,戴 ) ,表示穿著的狀態,它不僅可以表示“穿著”某種

          衣服,還可廣義地用于穿鞋、穿襪、戴帽、戴手表、戴眼鏡等。如:

          She was wearing a red dress ( a pair of white gloves , glasses , a gold ring , a new watch ) at the ball that night . 那天晚上在舞會上她穿著紅色連衣裙 ( 戴著一副白手套,眼鏡,一枚金戒指,一塊新手表 ) 。

          ( 2 ) dress ( 穿,穿著 ) ,既可表示穿著的動作,又可表示穿著的狀態,只用于穿衣。當 dress 作及物動詞時,后面的賓語只能是人。

          Have you finished dressing ?

          He dressed and went out .

          She was dress in with .

          Mother dressed the child .

          ( 3 ) in ( 穿著,身著 ) ,表示狀態。in 是介詞。

          The PLA men are in green uniform .

          The comrade in blue is director of the play .

          Come to school in your old clothes tomorrow !

          ( 4 ) put on 強調“穿,戴”的動作,不能與表示持續性的時間狀語連用。如:

          He put on his coat and went out .

          He put on his glasses to read the letter .

          You don't need to put on your cap .

          ( 5 ) try on ( 試穿 ) ,表示動作,如:

          I went to the tailors to try on my new suit .

          Several pairs f shoes were tried on , but none of them were satisfactory .

          Can I try it on ?

          Mary was trying on a new dress .

          23 . must be 的幾種意義

          [釋疑]①在被動語態中,表示“必須,應當”即:

          “must + be + 過去分詞”,如:

          Young trees must be looked after .

          This thing must be handled with care .

          A greenhouse must be built first .

          This must be done as soon as possible .

          ②must be 表示一種推測,意思是“大概是”,“可能是”,“準是”,如:

          He must be in the workplace now .

          Grandpa Li must be over seventy now .

          I'm afraid you must be right .

          Ah ! it must be more delicious !

          ③must be 表示“必須是”,“一定是”。如:

          The ground must be just right - Neither too wet nor too dry .

          The answers must be right .

          24 . 表示命令、請求和指示的交際用語

          [釋疑]命令、請求或指示對方干什么或不要干什么,在英語中最常用的是第二人稱祈使句,主語 you 通常不表示出來。祈使句的肯定式以原形動詞開始,句首或句尾可以加 please ; 祈使句的否定式以“Don't + 動詞原形”開始。例如:

          Put the tree in the hole so that it is straight .

          Water the trees as often as possible .

          Don't dig the hole too large .

          25 . It's best to do sth . 最好是…… ( 干某事 )

          [釋疑]這是表示建議的交際用語,意思相當于“You'd better do sth . ” ( 你最好干某事 ) 。如 It's best to plant trees in spring because it's warmer . ( = You'd better plant trees in spring because it's warmer . )

          It's best to water well when the earth is dry .

          It's best to fill in the hole with earth .

          It's best to harvest at the right time .

          It's best to come to school in your old clothes tomorrow because we are going to plant trees in the park .

          【 妙文賞析 】

          The Lose Outweights the Gain

          Joel Adams laments , “When we went on vacation two years ago , burglars broke in and stole $250 . So , last year I got smart , I left all the lights on and turned on all the radios and TV s . The burglars were afraid to show up and didn't get a cent - but the electric company got $523 ! ”

          得不償失

          喬爾亞當斯悲嘆道:“兩年前我們外出度假,家里沒有人,小偷撬門進來偷走了250

          美元。去年我學聰明了。我把屋里所有的燈、收音機和電視都打開。小偷不敢來了,一分錢

          都沒偷走,可電力公司向我們要去了523美元 ! ”

          【 思維體操 】

          你能猜出下列謎語嗎 ?

          1 . What letter is a drink ?

          2 . What letter is a part of the face ?

          3 . What letter is an insect ?

          4 . Which letter goes all around an is land ?

          5 . What changes a pear into a pearl ?

          6 . What is the most important thing in the world ?

          7 . What is that which is seen twice in “every day”and four times in“every week”yet only once in“a year” ?

          8 . Why is the letter B like fire ?

          9 . Why is the letter F like a cows tail ?

          10 . What part of London is in France ?

          11 . Why is the letter G like the sun ?

          12 . Why is the letter T like an is land ?

          13 . Why is U the happiest letter ?

          14 . Which letter is most useful to a deaf woman ?

          15 . What letter in the alphabet and travel the greatest distance ?

          16 . What is the end of everything ?

          17 . In what way are the letter O and E neatly keep house a like ?

          18 . What does the letter B do for boys as they grow up ?

          19 . Why is a sewing machine like letter S ?

          20 . Why is a false friend like the letter P ?

          1 . T ( tea ) 2 . I ( eye ) 3 . B ( bee ) 4 . C ( sea ) 5 . L 6 . The letter E , because it is first in everything and everybody . 7 . Letter E . 8 . because it makes oil boil . 9 . Because it is at the end of beef . 10 . The letter N .

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