教學(xué)目標(biāo)
教學(xué)目標(biāo)與要點(diǎn)
1．掌握本單元的有關(guān)栽樹(shù)的方法、程序以及一些有關(guān)植樹(shù)的日常用語(yǔ)和句式。如：The more, the better. It’s best to do sth 等。
2．掌握本單元的詞匯，特別是短語(yǔ)so that, beep… from…, thanks to, more or less等的用法。
3．掌握含有情態(tài)動(dòng)詞被動(dòng)語(yǔ)態(tài)的構(gòu)成形式及其肯定、否定和疑問(wèn)形式。同時(shí)還要學(xué)會(huì)英語(yǔ)中關(guān)于長(zhǎng)、寬、高、深等的表達(dá)方式。
4．學(xué)會(huì)寫notice，要注意它的格式和組成部分。可參考Lesson 44。
5．認(rèn)真學(xué)習(xí)“The Great Green Wall”，理解它的重要性，進(jìn)一步確立Work hard to make our world more beautiful!的觀念。
教材內(nèi)容分析
本單元圍繞“植樹(shù)”這個(gè)話題，學(xué)習(xí)和了解植樹(shù)的重要性及如何栽樹(shù)。課文“The Great Green Wall”講述了森林對(duì)人類的重大作用。通過(guò)學(xué)習(xí)課文和對(duì)話，進(jìn)一步復(fù)習(xí)、歸納了被動(dòng)語(yǔ)態(tài)的用法，重點(diǎn)學(xué)習(xí)了含有情態(tài)動(dòng)詞的被動(dòng)語(yǔ)態(tài)的構(gòu)成，講述了英語(yǔ)中長(zhǎng)、寬、高的表示方法，學(xué)習(xí)了一些常用詞匯和日常交際用語(yǔ)及重點(diǎn)句式：The more, the better；教會(huì)了我們?nèi)绾螘鴮憂otice。
本單元詞組及日常交際用語(yǔ)
�。ㄒ唬┍締卧~組與短語(yǔ)
1．Tree Planting Day 植樹(shù)節(jié)
2．neither…nor… 既不……也不……
3．It’s best to do sth. 最好做……
4．knock…in to… 把……插進(jìn)……里
5．make sure 確保，查明
6．so that 以便，以致
7．several times 多次
8．tie …to… 把……系到……
9．keep…straight 使……直立
10．the Great Green Wall 綠色長(zhǎng)城
11．hear of 聽(tīng)說(shuō)
12．keep…from doing… 阻止，防止
13．run away 逃走，流失
14．rain drops 雨點(diǎn)，雨滴
15．wash away 沖走
16．the dead leaves 枯葉
17．stay in one place 留在一處
18．in this way 用這種方法
19．millions off 幾百萬(wàn)的
20．blow away 吹走，刮走
21．move towards… 向……移動(dòng)
22．the rich farmland 富饒的農(nóng)田
23．a(chǎn)ll over the world 世界各地，遍及全世界
24．a(chǎn)sk sb. about sth. 詢問(wèn)某人關(guān)于某事的情況
25．the more, the better. 越多越好
26．in a few years’ time 幾年的時(shí)間之后
27．this year alone 只就今年一年
28．be covered with 用……覆蓋
29．point to 指向
30．thanks to 幸虧；由于
31．far away 遙遠(yuǎn)
32．a(chǎn)t the right time 適時(shí)
33．out of class 在課堂以外
34．hand in 交上來(lái)
35．more or less 大約
36．fill…with… 用……填滿
37．notice to the audience 聽(tīng)眾須知
38．Children under 1.2 m in height 身高不足1.2米的孩子
39．keep off 避開(kāi)，防止
教學(xué)建議
本單元重點(diǎn)例句及相關(guān)知識(shí)的講解
1. Come to school in your old clothes tomorrow.
明天請(qǐng)穿舊衣服來(lái)學(xué)校。
英語(yǔ)中表示“穿”的詞有wear, put on, have on, dress, be in, etc. 它們的具體用法如下：
wear, have on和be in強(qiáng)調(diào)狀態(tài)，wear有時(shí)可用進(jìn)行時(shí)態(tài)；put on強(qiáng)調(diào)動(dòng)作；dress既可表示狀態(tài)，也可表示動(dòng)作, dress后不直接跟表示服裝、鞋、帽等名詞，而其他所列名詞后跟服裝鞋帽等名詞，be in后可接表示顏色的名詞。例如：
Lucy is too young to dress herself. Tom was putting on his trousers when Lucy called him. Tom pushed the door and asked, “Do you know Kate?” Lucy answered, “I’ve know the girl in red before. ” Kate was in a red coat when she came in. She helped Lucy to dress. Everything is ready now. Lucy is wearing a new hat. Tom has on a black coat.
露西太小了，不能給自己穿衣服。露西喊湯姆時(shí)，他正在穿褲子。湯姆推門問(wèn)：“你認(rèn)識(shí)凱特嗎？” 露西回答：“我以前就認(rèn)識(shí)那個(gè)穿紅衣服的女孩兒”。凱特進(jìn)來(lái)時(shí)穿著一件紅色的外套。她來(lái)幫露西穿衣服�，F(xiàn)在一切就序，露西戴著一頂新帽子。湯姆穿著一件黑外套。
2. The ground must be just right——neither too wet nor too dry.
土壤一定要正好，既不能太濕，也不能太干。
just right 正合適； neither…nor…既不……也不……，它可以連接兩個(gè)主語(yǔ)、表語(yǔ)、賓語(yǔ)，還可以連接兩個(gè)狀語(yǔ)等，當(dāng)它連接兩個(gè)主語(yǔ)時(shí)，謂語(yǔ)動(dòng)詞應(yīng)根據(jù)就近原則，即在人稱和數(shù)上與后面的一個(gè)主語(yǔ)保持一致。
The driver drives neither slowly nor quickly.
那司機(jī)開(kāi)車既不慢，也不快。（連接狀語(yǔ)）
The old man can neither see nor hear.
那老人既看不見(jiàn)，也聽(tīng)不見(jiàn)。（連接謂語(yǔ)）
Bill has neither brothers nor sisters.
比爾既沒(méi)兄弟，也沒(méi)姐妹。（連接賓語(yǔ)）
Neither he nor I am a teacher. 或
Neither I nor he is a teacher.
他和我都不是教師。（連接表語(yǔ)）
Neither they nor Mary is going to the zoo tomorrow. 或
Neither Mary nor they are going to the zoo tomorrow.
他們和瑪麗明天都不去動(dòng)物園。（連接主語(yǔ)）
注意：neither和of連用，后接物主代詞、名詞等限定的復(fù)數(shù)名詞時(shí)，其謂語(yǔ)動(dòng)詞用單數(shù)形式；另外，neither的意思是“兩者中任何一個(gè)都不”，指人或指物，是單數(shù)概念，用于沒(méi)有冠詞、物主代詞，指示代詞等限定的單數(shù)名詞前，其謂語(yǔ)動(dòng)詞用單數(shù)形式。例如：
Neither of the flowers is beautiful.
兩朵花都不好看。
Neither of them is teacher.
他們倆都不是老師。
Neither story is interesting.
兩個(gè)故事都沒(méi)有趣味。
Neither answer is right.
兩個(gè)答案沒(méi)有一個(gè)是正確的。
I like neither school – bag.
兩個(gè)書包我都不喜歡。
3. Dig a hole large enough for the tree.
給樹(shù)挖一個(gè)足夠大的坑。
enough“足夠的”，修飾形容詞或副詞時(shí)，要放在被修飾詞之后；修飾名詞時(shí)，可以放在名詞前也可以放在名詞后。
My brother has enough money /money enough to buy his own car now.
我兄弟有足夠的錢可以買一輛自己的小汽車。
He is tall enough to reach the apples on the tree.
他夠高的了可以夠到樹(shù)上的蘋果了。
Li Ming is studying hard enough to catch up with other students.
李明學(xué)習(xí)很努力可以追上其他同學(xué)了。
4. Knock a long, strong stick into the earth in the hole.
在坑里插入一根長(zhǎng)而粗的棍子。
knock sth. into… 把……插進(jìn)（釘進(jìn)）……，knock at (on) 敲……；另外knock into可以表示“碰撞”解。例如：
Don’t knock the nail into the chair.
不要把釘子釘進(jìn)椅子里去。
Listen! Someone is knocking at (on) the door.
聽(tīng)！有人在敲門。
The young man knocked into me yesterday.
昨天那年輕人撞了我。
5. Made sure that it is straight.
確保樹(shù)是直立的.
make sure表示“弄確實(shí)；核實(shí)；查證”。make sure常用于祈使句，后面常接that賓語(yǔ)從句或of介詞短語(yǔ)。Make sure + that從句意為“弄明白；確信”。Make sure + of + 代詞/名詞，意思也是“弄明白；確信”。例如：
— Make sure of his coming before you set off.
— I make sure (that) he would come.
— 出發(fā)之前要確定他是否來(lái)。
— 我確信他會(huì)來(lái)。
另外，be sure + 不定式大多數(shù)情況下也用于祈使句，表示“務(wù)必；一定要；不要忘記”。
例如：
Be sure to come to our party if you have time.
如果有時(shí)間的話請(qǐng)一定來(lái)。
Be sure to finish the work as soon as possible.
請(qǐng)務(wù)必盡快完成這項(xiàng)工作。
6. Tie the tree to the top of the stick to keep it straight.
把樹(shù)系在棍子的頂部讓他直著。
(1) tie v.“系上”；n.“領(lǐng)帶，領(lǐng)結(jié)”；tie…to…意為“把……系在……”。
She tied his horse to a tree by the road.
他把馬拴在路旁的一棵樹(shù)上。
She bought a tie for her husband yesterday.
她昨天給她丈夫買了條領(lǐng)帶。
(2) to keep it straight 是動(dòng)詞不定式，在句中作狀語(yǔ)，表示捆樹(shù)的目的。keep it straight 為“動(dòng)+ 賓 + 賓補(bǔ)”結(jié)構(gòu)，如：
You'd better keep your room clean. 你最好使你的房間保持清潔。
Don't touch the machine. You must keep yourselves away from any danger. 別動(dòng)機(jī)器，你該保證自己的安全。
7. But more “Great Green Walls” are still needed, and not only in China.
但是，更多的綠色長(zhǎng)城仍舊需要，這不僅在中國(guó)。
not only 能常和but also連用，意思是“不但……而且……”，可以連接兩個(gè)主語(yǔ)、謂語(yǔ)、賓語(yǔ)等，當(dāng)連接兩個(gè)主語(yǔ)時(shí)，謂語(yǔ)動(dòng)詞應(yīng)和第二個(gè)主語(yǔ)在人稱和數(shù)上保持一致，also往往可以省略。例如：
She is good at not only dancing but (also) singing. She is both a dancer and a singer.
她不但善長(zhǎng)跳舞，而且善長(zhǎng)唱歌。（連接兩個(gè)賓語(yǔ)）她是個(gè)舞蹈家和歌唱家。
Not only you but (also) your sister has to get to school on time. Being on time is a must.
不僅你而且你妹妹都得按時(shí)到校。守時(shí)是必須的。
8. Many thousands of trees must be planted every year.
每年必須種植成千上萬(wàn)棵樹(shù)。
�。�1）thousands of這種類型的結(jié)構(gòu)前面已講述過(guò)，它的前面不可用具體的數(shù)字，可用不確定數(shù)目的修飾語(yǔ)，如some, many, several等。
Some hundreds of people watched the match.
好幾百人觀看比賽。
（2）plant / grow
這兩個(gè)動(dòng)詞都有“種”的意思，區(qū)別如下：
1) plant“種植”，及物或不及物均可，常指移植已長(zhǎng)成秧苗的植物，可用于“plant+場(chǎng)地+with”結(jié)構(gòu)。如：
They planted trees in the garden. = They planted the garden with trees. 他們?cè)诨▓@里種樹(shù)。
April is time to plant. 四月是種植季節(jié)。
2）grow“栽培；（人或草本等）生長(zhǎng)”，及物或不及物均可，常指使某種植物從種子起在某地生長(zhǎng)，不移走。如：
They grow roses in the greenhouse. 他們?cè)跍厥依镌耘嗝倒寤ā?/P>
Do all plants grow from seeds? 所有的植物都從種子長(zhǎng)成的嗎？
3) 指種植花草，用grow或plant均可；指種植樹(shù)木，一般用plant；指種植農(nóng)作物，用grow。如：
We have grown / planted a lot of flowers this summer. 我們夏天栽培了許多花。
People in the south grow rice. 南方人種植水稻。
9. The more, The better.
越多越好。
So the more trees there are, the better harvests we have.
因此樹(shù)木越多，我們的收成也越好。
the +比較級(jí) + …，the + 比較級(jí) +…。這個(gè)句型的意思是“越……，越……”。例如：
The busier the farmers are, the happier they feel. The more students read, the better their English will be. The longer plant grows, the better.
農(nóng)民們?cè)矫υ礁吲d。學(xué)生讀得越多，他們的英語(yǔ)會(huì)越好。莊稼的生長(zhǎng)期越長(zhǎng)，長(zhǎng)得越好。
10. In a few years’ time, those mountains will be covered with trees, too.
幾年之后，那些山上也將栽滿了樹(shù)。
in a few years’ time意思是“幾年時(shí)間之后”，類似的用法還有：In two days’ time, in three months’ time等。例如：
In two days’ time, the work will be finished.
兩天的時(shí)間，就能完成此項(xiàng)工作。
11. Was it difficult to work on the Great Green Wall?
從事綠色長(zhǎng)城工作難嗎？
It + is / was + 形容詞 + 不定式。這種句型中不定式是真正的主語(yǔ)，it是形式主語(yǔ)。例如：
It’s best to plant trees in spring.
最好在春季植樹(shù)。
It’s best to read English every day.
最好每天讀英語(yǔ)。
It’s interesting to play games with Children.
和孩子們一起做游戲是很有趣的。
12. But thanks to the Great Green Wall, the land produces more crops.
但是幸虧有綠色長(zhǎng)城，土地長(zhǎng)出了更多的莊稼。
thanks to幸虧，由于。thanks為名詞，常用復(fù)數(shù)。例如：
Thanks to your help, we were successful. Thanks to the policeman, the old man was brought home.
由于你的幫助，我們成功了。多虧了警察，老人被送回了家。
13. The Great Green Wall is 7, 000 kilometres long, and between 400 and 1, 700 kilometres wide.
綠色長(zhǎng)城有7000公里長(zhǎng)，400到1700公里寬。
�。�1）計(jì)量的表達(dá)法是：
主語(yǔ)+ be+數(shù)詞+metres / kilometers + long/ wide/ high/ tall/ deep等形容詞。例如：
The river is about 100 metres deep. The mountain is nearly 4, 000 kilometres high.
這條河大約有100米深。這座山有近4000米高。
Our classroom is ten metres long and seven metres wide.
我們的教室十米長(zhǎng)，七米寬。
�。�2）分?jǐn)?shù)表達(dá)法：分子用基數(shù)詞計(jì)數(shù)，分母用序數(shù)詞計(jì)數(shù)，同時(shí)分子是1以上的數(shù)字，分母用復(fù)數(shù)形式；分子為1時(shí)，分母采用單數(shù)形式。l/2:one second; l/3:a third; 2/5:two fifths等。特殊的表達(dá)法有：a half, a quarter, three quarters等。
14. — Is it straight?
— More or less!
— 它直嗎？
— 有一點(diǎn)兒直!
more or less“差不多；大概”相當(dāng)于about。
The road is two hundred metres long, more or less.
這條路大概有兩百米長(zhǎng)。
The exercises are more or less finished.
作業(yè)快要做完了。
15. Children under 1.2m in height can not be taken into the concert hall.
1.2米以下的孩子禁止帶入會(huì)場(chǎng)。
height 為名詞，形容詞為high. 1.2 m in height 意為 1.2m high。如：
— What is his height？
— He is six feet in height (＝He is six feet high．)
— 他有多高？
— 他有六英尺高。
關(guān)于含有情態(tài)動(dòng)詞的被動(dòng)語(yǔ)態(tài)的講解
※含有情態(tài)動(dòng)詞的被動(dòng)語(yǔ)態(tài)的構(gòu)成
前兩個(gè)單元已學(xué)過(guò)一般現(xiàn)在時(shí)態(tài)和一般過(guò)去時(shí)態(tài)的被動(dòng)語(yǔ)態(tài)的構(gòu)成，以及被動(dòng)語(yǔ)態(tài)的用法。本單元學(xué)習(xí)含有情態(tài)動(dòng)詞的被動(dòng)語(yǔ)態(tài)。它的構(gòu)成形式是：情態(tài)動(dòng)詞+ be + 動(dòng)詞的過(guò)去分詞；否定式是在情態(tài)動(dòng)詞后 + not, 疑問(wèn)式是將情態(tài)動(dòng)詞放于主語(yǔ)之前。情態(tài)動(dòng)詞有：can, may, must, school, could, have to等。例如：We must find out the truth . → The truth must be found out .
（1）The trees must be planted in spring.
樹(shù)必須春天栽。
�。�2）May the exercises be done tomorrow?
練習(xí)可以明天做嗎？
�。�3）Books can not be taken out of the reading-room.
書不能帶出閱覽室。
�。�4）These young trees should be watered every day.
這些小樹(shù)應(yīng)每天澆水。
�。�5）The sick person need be taken good care of.
那病人需要很好地照顧。
�。�6）Your bike has to be mended well.
你的自行車需好好修修了。
※ 被動(dòng)語(yǔ)態(tài)與系表結(jié)構(gòu)的區(qū)別
動(dòng)詞 be + 過(guò)去分詞這個(gè)結(jié)構(gòu)并不定都是被動(dòng)語(yǔ)態(tài)結(jié)構(gòu)，有時(shí)它可能是 be + 過(guò)去分詞 ( 作表語(yǔ) ) 的系表結(jié)構(gòu)。因此：
be + 過(guò)去分詞 ( 被動(dòng)語(yǔ)態(tài) ) 與 be + 過(guò)去分詞 ( 作表語(yǔ) ) 這兩種結(jié)構(gòu)的主要差別是：
�、俦粍�(dòng)結(jié)構(gòu)表示一個(gè)動(dòng)作，帶表語(yǔ)的結(jié)構(gòu)表示主語(yǔ)的特點(diǎn)或所處的狀態(tài)。如：
The library is now closed . ( 系表結(jié)構(gòu) )
It is usually closed at 6 . ( 被動(dòng)結(jié)構(gòu) )
�、诒粍�(dòng)結(jié)構(gòu)后面可帶 by + 實(shí)施動(dòng)作者，而系表結(jié)構(gòu)一般沒(méi)有。如：
The glass is broken . ( 系表結(jié)構(gòu) )
It was broken by my sister . ( 被動(dòng)結(jié)構(gòu) )
�、邸跋当斫Y(jié)構(gòu)”中的過(guò)去分詞可以被 well , very 等副詞修飾，而“被動(dòng)結(jié)構(gòu)”中的過(guò)去分詞則一般不能如此。如：
The book is well written . ( 系表結(jié)構(gòu) )
The book is written by Li Ming . ( 被動(dòng)結(jié)構(gòu) )
④被動(dòng)結(jié)構(gòu)可以用于許多時(shí)態(tài)之是，而系表結(jié)構(gòu)只用于一般現(xiàn)在時(shí)和一般過(guò)去時(shí)這兩種時(shí)態(tài)。如：
The work is being done . ( 被動(dòng)語(yǔ)態(tài) )
The work is done . ( 系表結(jié)構(gòu) )
�、菹当斫Y(jié)構(gòu)有主動(dòng)意義，而被動(dòng)結(jié)構(gòu)只有被動(dòng)意義。被動(dòng)結(jié)構(gòu)的句子往往有表示動(dòng)作的時(shí)間、地點(diǎn)、方式、目的等狀語(yǔ)，而系表結(jié)構(gòu)一般沒(méi)有這樣的狀語(yǔ)。如：
The photo was taken last month . ( 被動(dòng)語(yǔ)態(tài) )
The photo was well taken . ( 系表結(jié)構(gòu) )
本單元的有關(guān)聽(tīng)說(shuō)讀寫的教學(xué)建議
◆有關(guān)聽(tīng)說(shuō)方面的教學(xué)建議
本單元第41課以Read and act的形式來(lái)引出本課的教學(xué)重點(diǎn)。教師應(yīng)充分利用這個(gè)對(duì)話情景，進(jìn)行對(duì)話表演，以提高學(xué)生的興趣，達(dá)到自然地呈現(xiàn)新課的目的。
教師在上課時(shí)，可穿一件舊衣服或工作服，問(wèn)學(xué)生，“I came to school in/I'm wearing my old clothes today. Tomorrow you will come to school in your old clothes. Do you know why?” 這時(shí)，學(xué)生們可以進(jìn)行多種猜測(cè)。在學(xué)生情緒高漲時(shí)，教師讓他們帶著問(wèn)題聽(tīng)課文錄音。在聽(tīng)第一遍錄音后，利用本課掛圖，再讓學(xué)生聽(tīng)一至兩遍錄音。為了幫助他們更好地理解對(duì)話的內(nèi)容和句型，教師此時(shí)可將一些關(guān)鍵詞寫在黑板上，如：: in old clothes, What's happening? Tree Planting Day, Really? Wonderful! 在學(xué)生了解了對(duì)話的基本內(nèi)容后，教師可放錄音讓全班跟讀或分角色對(duì)話。然后兩人一組借助黑板上的關(guān)鍵詞來(lái)復(fù)述或表演。注意這段對(duì)話的主要目的是引出下面的“instructions”，而且對(duì)話中新的語(yǔ)言知識(shí)不多，所以不必占用過(guò)多的時(shí)間。
在進(jìn)行了一定的pair work 之后，教師可以要求學(xué)生進(jìn)行表演練習(xí)。出示關(guān)于植樹(shù)過(guò)程的一組圖，讓學(xué)生回憶植樹(shù)的經(jīng)過(guò)和步驟，在教師的引導(dǎo)之下，用英語(yǔ)將這些步驟表達(dá)出來(lái)。
如：How to choose the ground?
What should we do for the first step? Dig a hole or knock a stick into the earth?
What should we do for the second step? Knock a stick into the earth or put the tree into the hole?
What should we do next? Put the tree into the hole or put the earth back into the hole?
What should we do next then? Push the earth down hard?
Tie the tree to the stick or water the tree well. which step comes earlier?
通過(guò)上述問(wèn)題的問(wèn)答，學(xué)生就基本上明白了植樹(shù)的步驟。然后要求學(xué)生在小組內(nèi)進(jìn)行口頭的表達(dá)，要求學(xué)生能夠比較流利的表達(dá)植樹(shù)的過(guò)程。
第44課在Read and act下也有3段對(duì)話。但與第41課對(duì)話不同。這時(shí)學(xué)生已學(xué)完本單元的語(yǔ)法重點(diǎn)和閱讀文章。這3段對(duì)話設(shè)計(jì)的目的在于鞏固學(xué)生所學(xué)的知識(shí)，并提供不同情景引導(dǎo)他們實(shí)際應(yīng)用。教師可設(shè)計(jì)如下3幅簡(jiǎn)筆畫。
教師可分段放錄音或在課前事先安排3位學(xué)生與教師配合表演這3段對(duì)話。然后進(jìn)行全班、半班或兩人一組的練習(xí)。教師分段抽查數(shù)組表演情況。在學(xué)生已基本能分別表演3段對(duì)話的基礎(chǔ)上，讓他們將3段對(duì)話串在一起進(jìn)行表演，教師可用簡(jiǎn)筆畫或手勢(shì)、動(dòng)作來(lái)提示學(xué)生。
最后教師應(yīng)鼓勵(lì)學(xué)生實(shí)際應(yīng)用所學(xué)知識(shí)，如讓學(xué)生根據(jù)第41課的 “instructions”，依照第44課的3段對(duì)話，自編對(duì)話，進(jìn)行表演。以下4組對(duì)話包括了instructions中所有的注意事項(xiàng)，并盡量使用帶情態(tài)動(dòng)詞的被動(dòng)語(yǔ)態(tài)。如：
1. A: Will you help me plant this tree, please?
B: Of course/Certainly. What do you want me to do?
A: Well, dig a hole large enough for the tree. But don't dig the hole too deep/the hole should not be too deep.
B: OK. I've dug a hole. It’s just right.
2. A: Good. That's done. Hold this stick while I knock it in.
B: OK. Make sure that it is straight.
A: Is it straight (now)?
B: More or less!
3. B: What's next?
A: Put the tree in the hole now/The tree must be put in the hole now.
B: OK. I've done that.
A: Right. I'll put the earth back in the hole again while you hold the tree straight. Then, let's push the earth down hard with our feet several times.
4. B: Good. Now the tree must be tied to the top of the stick to keep it straight.
A: OK. While you're doing that, I'll go and get some water.
B: OK. But can we go and have a drink after that?
A: A drink? We've only just started! There are twenty more trees to be planted.
(Certainly. Let's go. But we have twenty more trees to be planted. )
◆有關(guān)讀寫方面的教學(xué)建議
在閱讀的教學(xué)過(guò)程中，一定要重視語(yǔ)篇的教學(xué)，也就是說(shuō)，在教學(xué)的過(guò)程中，教師不要過(guò)分的強(qiáng)調(diào)句子的結(jié)構(gòu)或者是過(guò)分的強(qiáng)調(diào)句子的語(yǔ)法功能分析，而忽略了文章的本來(lái)面目。例如，文章的結(jié)構(gòu)，文章的主題句，文章的基本段落的中心意義等。允其要引導(dǎo)學(xué)生將文章中的個(gè)別句子放在上下文的語(yǔ)境中進(jìn)行準(zhǔn)確理解。在教學(xué)本單元閱讀課文時(shí)，教師首先要讓學(xué)生了解課文大意，然后幫助學(xué)生分段理解，并可劃分段落，找出主題句(topic sentence)。在本課結(jié)束時(shí)，學(xué)生應(yīng)能復(fù)述課文。
在閱讀前，教師可設(shè)置如下問(wèn)題，讓學(xué)生猜測(cè)并討論，以引起他們的閱讀興趣。
What's the Great Green Wall?
Where does China build the Great Green Wall?
What does the Great Green Wall do?
在學(xué)生討論過(guò)程中，教師可利用學(xué)生用書第III頁(yè)彩圖和教師用書提供的材料 (Notes)，適當(dāng)給學(xué)生們補(bǔ)充一些背景知識(shí) 。
T: Sanbei shelter-forest (三北防護(hù)林) is known as China’s “Great Green Wall”. It is a “Great Green Wall” of trees, millions of trees. China has built a new Great Green Wall across the northern part, including Inner Mongolia, Shanxi, Hebei, Beijing and Tianjin. The Great Green Wall also covers some of the Northwest (Xinjiang, Qinghai, Gansu, Ningxia and Shanxi) and the western part of the Northeast (Liaoning, Jilin and Heilongjiang). It includes altogether 13 provinces, cities and autonomous regions (自治區(qū)). Its total area is 4, 069, 000 square kilometres, which cover 42.4% of the land of China. The building of the Great Green Wall will take 73 years (1978—2050). The Great Green Wall has already saved a lot of land by stopping the wind from blowing the earth away and the sand from moving towards the rich farmland in the south. But more “Great Green Walls” are still needed not only in China but all over the world.
教師在介紹背景知識(shí)時(shí)，可借助中國(guó)地圖、手勢(shì)等使學(xué)生大致了解，必要時(shí)可用漢語(yǔ)解釋。文中劃線句子為課文中原句或?qū)υ渖约痈膭?dòng)的句子。教師在講到這些句子時(shí)可適當(dāng)強(qiáng)調(diào)、重復(fù)，以加深學(xué)生的印象。
然后讓學(xué)生打開(kāi)書閱讀課文。在確知大部分學(xué)生已基本掌握課文大意的情況下，要求他們劃分課文段落并找出每個(gè)段落的主題句 (topic sentence)。然后對(duì)文章進(jìn)行段落的劃分。然后讓學(xué)生歸納出每個(gè)段落的大意。
課文的段落劃分和主題句或大意如下：
第一段：第l自然段
主題句：Forests help to keep water from running away.
第一段大意：The importance of forests;
第二段：第2—3自然段
主題句：Chinese people have built a new Great Wall.
第二段大意：Something about the Great Wall in China
第三段：第 4—6自然段
主題句：The more trees there are, the better harvests we have.
第三段大意：Something about a worker, who works on the Green Great Wall, thinks highly about the Green Great Wall.
教師還可以讓學(xué)生填寫下表：
THE GREAT GREEN WALL
|
Special features |
across the northern part of China，7，0OO kilometres long，between 400 and l700 kilometres wide |
|
Functions |
It stops the wind from blowing the earth away; and stops the sand from moving toward the rich farmland in the south. It has saved a lot of land. |
|
Wang Feng and other workers |
They work at Yulin in Shaanxi. They have planted ten thousand tree this year. It’s difficult to work on the Great Green Wall. They have to grow their own food. |
|
Forests |
keep from, water, soil, floods |
|
China |
copy, across, is…long and between…and …wide, stop…from, save, needed, all over the world |
|
Wang Feng |
work on…, visit, among, ask, plant, over there, on the hill, five years ago, in a few years’ time, be covered, point to, difficult, grow food, thanks to |
在進(jìn)行寫作訓(xùn)練時(shí)，可以要求學(xué)生仿照課文，寫一篇以How to plant flowers in the garden 為題目作文。
關(guān)于帶情態(tài)動(dòng)詞的被動(dòng)語(yǔ)態(tài)的教學(xué)建議
本單元在前兩個(gè)單元學(xué)習(xí)一般現(xiàn)在時(shí)和一般過(guò)去時(shí)的被動(dòng)語(yǔ)態(tài)的基礎(chǔ)上，繼續(xù)學(xué)習(xí)帶情態(tài)動(dòng)詞的被動(dòng)語(yǔ)態(tài)。
在第41課，以顯著的位置展示題為“HOW TO PLANT A TREE”的操作規(guī)程（instructions），教師如果僅僅是按部就班地講解，就會(huì)使學(xué)生感到枯燥乏味。要充分利用課文中所提供的情景，在有意義的情景中教學(xué)語(yǔ)法知識(shí)。例如，教師可利用簡(jiǎn)筆畫來(lái)引出新的語(yǔ)法知識(shí)。學(xué)生基本掌握instructions大意后，教師應(yīng)引導(dǎo)他們理解情態(tài)動(dòng)詞的用法。到了第43課可采用對(duì)比的方法。教師列出兩個(gè)框框，要求學(xué)生分別填上課文中已出現(xiàn)的帶情態(tài)動(dòng)詞的句子，和可以由主動(dòng)語(yǔ)態(tài)變?yōu)榍閼B(tài)動(dòng)詞的被動(dòng)語(yǔ)態(tài)的句子，把變化后的句子填入框內(nèi)。如下表：
|
1. The ground must be just right. 2. But the hole should not be too deep. |
|
1. The earth should be neither too wet nor too dry. 2. A hole must be dug large enough for the tree. The size of the hole must be just right. 3. A long, strong stick should be knocked into the earth next to the hole. It must be firmly planted. 4. The tree must be put in the hole so that it is straight. The tree must stand straight in the hole. 5. The earth must be put back in the hole again. 6. The earth should be pushed down hard with .... 7. The tree must be tied to the top of the stick .... 8. It should be watered well, .... |
學(xué)生在做這個(gè)練習(xí)時(shí)，對(duì)本課句型與詞匯有了進(jìn)一步認(rèn)識(shí)，同時(shí)也鍛煉了寫的能力。
在有條件的學(xué)校可放教學(xué)錄相以加深印象。在全班讀熟課文后，展示幾幅植樹(shù)的圖片，讓學(xué)生獨(dú)自準(zhǔn)備幾分鐘，進(jìn)行連鎖練習(xí)，按次序復(fù)述instructions。也可兩組之間進(jìn)行比賽，由A組說(shuō)出第一條注意事項(xiàng)，再由B組說(shuō)出下一條。最初可完全復(fù)述課文原句。熟練后，可全部用主動(dòng)語(yǔ)態(tài)或全部用被動(dòng)語(yǔ)態(tài)，或一句主動(dòng)語(yǔ)態(tài)一句被動(dòng)語(yǔ)態(tài)交替出現(xiàn)，或句子中帶有情態(tài)動(dòng)詞等方式進(jìn)行操練。
關(guān)于計(jì)量表達(dá)法的教學(xué)建議
本單元第42課教學(xué)了計(jì)量 (measurement)表達(dá)法。
表示計(jì)量的方法是：數(shù)詞+metres/ kilometres +long/wide/deep/high/tall…
表示重量可用數(shù)詞+kilograms +heavy.
The classroom is 4 metres wide.這個(gè)教室有4米寬。
The river is about 10metres deep.這條河大約有10米深。
教師可利用學(xué)生身邊的事物教學(xué)計(jì)量表達(dá)法。例如描述教室及桌椅，可說(shuō)出以下句子：
The classroom is 3. 5 metres high, 4. 5 metres wide and 5. 5 metres long.
The table is half a metre high.
也可以出示一幅世界地圖，讓學(xué)生造句：
The Yellow River is 5, 464 kilometres long and between…and…metres deep.
Mount Qomolongma is 8848. 13 metres high.
The Yangtze River is about 6,300 kilometres long.
The lake is between 150 and 250 metres wide.
以上例句呈現(xiàn)完畢后，可讓學(xué)生自己歸納計(jì)量表達(dá)法的特點(diǎn)，并將它寫在黑板上：
metre (s) /kilometers + long/wide/deep/high/tall …
第43課第一部分和此課練習(xí)冊(cè) Ex2是為練習(xí)計(jì)量表達(dá)法而設(shè)計(jì)的。教師還可要求學(xué)生造句，造句最多而錯(cuò)誤最少的學(xué)生將給予獎(jiǎng)勵(lì)。