unit 4 save the trees

2018-12-15 17:51

用心收获成绩,细心成就明天,恒心改变未来

Unit 4 Save the trees

重点单词

Save 节约,节省 pine n.松树 discuss v.讨论,谈论 Branch n.树枝,分歧 root n.根,根源 fight v.与···战斗 Against 反对,违反 example 例子 harmful 有害的 gas 气体,毒气 produce n.农产品 oxygen n.氧气 major 主要的 convenient adj.方便的 furniture 家具 imagine想象,想到 disease n.疾病 dig v.挖

Hole n. 洞 carry 拿,搬运 container n.容器

必背短语:

take in 吸收 come from来自 for example例如 in fact实际上,事实上 look around四周环顾 (be) made of 由··组成 millions of 数以百万的 (be) good for对···有害

仔细讲解:

1.If I plant this seed in the ground,will it become a pear tree,Hi? 由if 引导的条件状语从句,表示”如果”,

①如果主句(包括祈使句、含有情态动词can、may、must)用一般现在时,从句也要 用一般现在时;

②主句用过去时,从句也要用过去的某种时态,如果主句是一般将来时态,从句要用 一般现 在时表示将来。

2.They help fight against pollution.(page44)

Fight vi. 与….斗争,常与介词against或with连用。 如:They fought against the enemy fiercely 扩展:fight vt.战斗,反对,可直接跟宾语。

如:They fought their enemies bravely. 他们勇敢杀敌 扩展:against prep. 意为“,违背,违抗;紧靠,防备”。Be against反对,be for 赞同 如:We take out umbrella just against a rainy day.我们带上雨伞以防雨天。

3.They take in harmful gases from the air and produce oxygen for us to breathe. ①harmful adj. 有害的; harm n. vt. 损害;伤害;危害; harmless adj.无害的,不致伤的.

如:It’s harmful to your eyes to read in the dark. No harm would come to us. produce vt. 产生,生产。也可以作为不可数名词,意为:产品,农产品。 produce 不可数n.“农产品”或 The farmers brought their “自然产品”的总称, produce to town early each Saturday morning. product 可数n.“产物,产品”,多指工业产Machinery, cars, ships are all 品, industrial products. 亦可指任何体力劳动或脑力劳动 生辉教育-陈老师: 135-3006-1126(番禺大石福泰园)

用心收获成绩,细心成就明天,恒心改变未来

所生 的东西或发源于其它事物的东西 production 不可数n.“生产,制造”。 The company is famous for the 指生产的行为。也可指“产量”。 production of small cars. 4.A lot of the furniture is made of wood.(page45)

①Furniture 不可数名词,家具。

a set of furniture一套家具; 一件家具a piece of furniture。 成品+be made in+地点 产于某地 原料+be made into+成品 ……被制成…… 成品+be made of+ 原由……制成 成品+be made by+制造者 ……被……制造 料(看得出,物理) 成品+be made from+原由……制成 料(看不出,化学) My piano is made in Beijing. The birthday cake is made by my mother. The table is made of wood. Wine is made from grapes. Grapes are made into wine. The bike is made in China. (记忆顺口溜:物质不变用of,物质变化是from)

5.I can’t imagine a world without trees. Imagine vt. 想像;猜想;臆断. 后面可跟名词,代词,动名词和从句作宾语。 Imagine 指设想与事实相反的东西,We can hardly imagine life without water. 指错误的猜想;也可以表示 我们简直不敢想象没有水的生活。 猜想的东西没有确定性,只是一种印象。 guess 缺乏任何一句或资料而凭主Open your eyes,and guess who has the 观印象的猜想 pen? 6.However, …

However 副词,表转折,意为:然而;不过。 However 副词 位于句首、居中、句末,要 Later, however, he changed 用逗号与其他部分隔开。 his mind. But 连词 位于句首或居中。but之后一But I did tell you about 般不得使用逗号 the examination! Hate 讨厌,不喜欢 Hate doing sth. 表示习惯性动作 Hate to do sh. 表示某一次具体的行为 7.She can skate at a very high speed because she practises a lot. ①Practise vt. 训练,练习。宾语可接名词,代词,动名词。

如:It's very important to practise listening. 练习听力是非常重要的。

②Practise vi. 如:Don' t forget to practise after class. 课后别忘了练习。

③practise的名词是 practice不可数名词。通常指经常性或系统性的重复练习。 Practice makes perfect. 是一句谚语,意思是“熟能生巧”。

8.But the speaker did not stop speaking until twenty past twelve.(page52)

生辉教育-陈老师: 135-3006-1126(番禺大石福泰园)

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Not…..until 意为:直到…..才…..。主语的动词一般为非延续性动词,它所表示的动作 直到 until所表示的时间才发生。

如:We won’t see any flowers until May.

Unitil 连词,意为:直到…..时。用于肯定句,主句的动词一般为延续性动词。

如:He waits the children are asleep. I shall stay here until twelve o’clock. 9. Another 指三者或三者以上中的“另一个” I don’t like this one. Please show me another. other Adj.其他的,其余的,常用复数形 Ask some other people. 式 the other 两者中“另一个”,one··the other··一 He has two daughters. One is a 个··另一个 nurse, the other is a worker. others 其他的人或物 There are no others. 没有别的了。 the others 其余的人或物,表示一个范围内其Two boys will go to the zoo, and 他全部 the others will stay at home. 10.辨析Carry, take,bring carry 搬,扛 不论移动的方向 The mother carries her baby in her arms。 bring 带来,带走 以说话人为中心, They’re going to bring some gifts for us 把某物带到说话人身边 on Christmas. take 以说话人为中心,把某物带到Please take these books to the library for 远处 me. 11.It covers five and a half million square kilometers of the Amazon Basin and spreads across nine countries.

(1)①Cover v. 覆盖,遮盖; cove…with 用···把··盖上; be covered with… 被….覆盖着。

如:The road is usually covered with snow in winter ②Cover 可数名词,意为:覆盖物,盖子,封面 如:The new book needs a new cover. 1. 区别:across, cross,through, over across 介词,在空间内从一端到另一端,或是十字交叉 (过河,过桥,过马路) 穿过. cross 动词,含义同上 through 介词。穿过,通过。动作是立体空间进行, 穿过沙漠,森林,窗户 over 动词,则是对于位置的高低而言,强调"翻越". 穿越高的障碍物, 如篱笆,栅栏,山脉 12.Many living things lose their homes because of deforestation. 许多生物因为森林砍伐失去家园。 Forestation 造林 deforestation 森林采伐 living n.生物 all living things——所有生物 生辉教育-陈老师: 135-3006-1126(番禺大石福泰园)

用心收获成绩,细心成就明天,恒心改变未来

adj.活着的、有生命的,主要用于 the living——活着的人们 作前置定语及冠词the之后,表示一类人 alive Live [laiv] 活着的、有活力的 “活的”“有生命的”“活生生的”, 主要用来说鸟或其他动物 实况的、现场直播的 lively 活泼的、有生气的、生动的 The fish is still alive/living. a live fish——一条活鱼; a live tiger——一只活老虎 a live report——现场报道 a lively child——活泼的孩子 a lively discussion——热烈的讨论 13.As a result, the number of kinds of animals, birds, insects and trees in the world is decreasing. 结果,世界上动物、鸟类、昆虫和树的种类的数目正在减少。 the number ···的数量,后接复数名词, The number of the students in our of 谓语动词要用单数, class is 45. a number of 大量,许多=many,后接复数名A number of students are 词,谓语动词要用复数 playing football. 14.Tea is the most popular drink in the world besides water. 茶是世界上除了水之外最受欢迎的饮料。 besides “除了……之外”(还有) Besides his wife,his daughter also went to see 相当于“加上”; him. 除了之外(没有)… I go to school every day except [but] Sunday. except 相当于“减去”; 介词,除了。只能和不定代Nobody knows the truth but Tom. but 词如nothing,all,anything, no one,anyone等连用。

语法:现在进行时 一、教材经典句子:

1.The children are playing in the park。

2.We are staying at Peter’s house at the moment。

二、现在进行时:一般表示此刻正在进行的动作,也表示目前阶段一直进行的动作。 三、用法:

1.现在进行时一般表示此刻正在进行的动作,常和now,right now,at this moment等 时间状语连用,以及动词look,listen等。

如:Look!She is cleaning my room now。

2现在进行时表示目前阶段一直进行的动作,但是说话时不一定正在发生, 常和“these days,this week,at present”等连用。 如:Is Jame working hard this term? 注意:

1.一些表示状态和意愿的动词,如be,like,want,kown,think,have等, 不能用于现在进行时态。 如: I want to go home now。

2.Come,go,leave,stay,start,arrive等表示往返或位置转移的动词,可以用现在进行

生辉教育-陈老师: 135-3006-1126(番禺大石福泰园)

用心收获成绩,细心成就明天,恒心改变未来

时表示将要发生的动作,这些动词可以与“tomorrow,next week”等表示将来的时间状语连用。

3.现在进行时与always,often等词连用,也可表示习惯的、经常重复的动作。意为总是,老师。此时常常有埋怨、赞赏的色彩。 如:Mary is always talking about her son.

四、结构:

1.肯定句:主语+be(am,is,are)+现在分词+其他 如:He is doing his homework . 2.否定句:主语+be(am,is,are)+not+现在分词+其他 如:he isn’t writing now? 3.一般疑问句:be(am,is,are)+主语+现在分词+其他? 如:Are you singing ?——yes ,I am.

4.特殊疑问句:疑问词+be(am,is,are)+主语+现在分词+其他? -What are you doing? -I am doing my homework. A. 现在分词的构成:

(1)一般情况下,直接加ing,如:cook-cooking

(2)以不发音的e结尾,去e加ing,如:make-making, taste-tasting

(3)如果末尾是一个元音字母和一个辅音字母,双写末尾的辅音字母,再加ing,

如:run-running, stop-stopping sit-sitting

get-getting run-running forget-forgetting begin-beginning (4)以ie结尾的动词,改ie为y加ing ,die--dying lie--lying

课 堂 练 习

1.写出下列动词的现在分词形式

work___________ dance__________ run__________ study__________ sing__________ have__________ sit__________ play__________ write__________ shop__________ study_________ mix__________ swim__________ listen _________

2.单选:

1、 Look! He _____their mother do the housework.

A. is helping B. are help C. is help D.is helpping 2 、_____are the boys doing ? They are singing in the room. A .Who B .How C.What D.Where 3、 Don’t talk here. My mother _____.

A. is sleeping B .are sleeping C. sleeping D .sleep 4 、Danny ______. Don’t call him.

A. is writeing B .is writing C.writing D .writes 5 、–When_____he_____back? – Sorry, I don’t know.

A. does,come B.are coming C.is come D.is coming 3.填空

1、 It’s ten o’clock. My mother _______ _______ (lie)in bed. 2、 What _______ he________ (mend)? 3、 We_______ _______ (play)games now. 4、 What_______you_______ (do) these days?

生辉教育-陈老师: 135-3006-1126(番禺大石福泰园)


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