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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