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1、精品文档7B Unit 4 save the trees.Date:,2013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.一战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，想至Udisease 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
2、from来自for example例如in fact实际上，事实上lookaround四周环顾(be)made of 由组成millions of数以百万的(be) good for对,一有害仔细讲解：1.If I plant this seed in the ground,will it become a pear tree，Hi? ( page43)由if引导的条件状语从句，表示“如果” ，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；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 .T
3、hey 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 回如：We take out umbrella just against a rainy day.我们带上雨伞以防雨
4、天。3 .They take in harmful gases from the air and produce oxygen for us to breathe. (page45)harmful 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 “自然产品”的总称，The fa
5、rmers brought their produce to town early each. 。1欢迎下载精品文档5欢迎下载Saturday morning.product可数n. “产物，产品”，多指工业产品， 亦可指任何体力劳动或脑力劳动所生 的东西或发源于具它事物的东四Machinery, cars, ships are all industrial products.production不可数n. “生产,制造”。指生产的行为。也可指“产量”。The company is famous for the production of small cars.Grapes are made
6、into wine.（记忆顺口溜：物质不变用The bike is made in China.of,物质变化是from )4.A lot of the furniture is made of wood. (page45)Furniture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+原料（看得出，物理）由制成成品+be made by+制造者被制造成品 +be made from+ 原料（看不出，化学）
7、由制成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.5.I can t imagine a world without trees.(page45)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，指错We can hardly imagine life without water.误的猜想；也可以表示猜想的东J我们简直不敢想象没有水
8、的生活。西没有确定性，只是一种印象。guess缺之任何一句或资料而凭主观 1Open your eyes , and guess who has the pen?印象的猜想6.However, （page48）However副词，表转折，意为：然而；不过。However副词位于在首、居中、句末，要 用逗号与其他部分隔开。Later, however, he changed his mind.But连词位于句首或居中。but之后 一般不得使用逗号But I did tell you about the examination!Hate讨厌，不喜欢Hate doing sth.表示习惯性动作Hat
9、e 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.Practise vt. 训练，练习。宾语可接名词，代词，动名词。如：Its very important to practise listening.练习听力是非常重要的。 Practise vi. 如：Dont forget to practise after class. 课后别忘了练习。practise 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
10、. 是一句谚语，意思是熟能生巧。4 .But the speaker did not stop speaking until twenty past twelve.（page52）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 wont 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 oclock.9.A
11、nother指三者或二者以上中的“另一个”I don t like this one. Please show me another.otherAdj.其他的，其余的，常用复数形式Ask some other people.the other两者中个 ,one-the other 一一个一另一个He has two daughters. One is a 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，表示一个范围内其他全 部Two boys will go to the z
12、oo, and the others will stay at home.10.辨析 Carry , take , bringcarry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， 把某物带到说话人身边Theyre going to bring some gifts for us on Christmas.take以说话人为中心，把某物带到远处Please take these books to the library for me.11.It covers five and a half millio
13、n square kilometers of the Amazon Basin andspreads across nine countries.(page54)(1)Cover v. 覆盖，遮盖；cove with 用一把 盖上； be covered with 被.覆盖着。如：The road is usually covered with snow in winterCover可数名词，意为：覆盖物，盖子，封面如：The new book needs a new cover.(2)区另1J： across , cross , through , overacross介词，在空间内从一端到
14、另一端， 或是十字交叉穿过.（过河，过桥，过马路）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.(page54)许多生物因为森林砍伐失去家园。livin gn.生物all living things所有生物adj.活着的、有生命的，主要用于作前置定语及冠词 the之后，表示一类人the living活着的人们alive活着的、有活力的T
15、he fish is still alive/living.Live“活的”“有生命的” “活生生的”，a live fish一条活鱼；laiv主要用来说鸟或其他动物a live tiger一只活老虎实况的、现场直播的a live report-现场报道livel活泼的、有生气的、生动的a lively child-一活泼的孩子ya lively discussion热烈的讨论13.As a result, the number。kinds of animals, birds, insects and trees in theworld is decreasing. 结果，世界上动物、鸟类、昆
16、虫和树的种类的数目正在减少。(page54)the number of一的数量，后接复数名词， 谓语动词要用单数，The number of the students in our class is 45.a number of大量，许多=many,后接复数名词， 谓语动词要用复数A number of students are playing football.14.Tea is the most popular drink in the world besides water.(page55)茶是世界上除了水之外最受欢迎的饮料。beside s“除了之外”（还有） 相当于“加上”；Besi
17、des his wife , his daughter also went to see him .except除了之外（没有）I go to school every day except but Sunday.相当于“减去”；but介词，除了。只能和不定代 词如 nothing , all , anything , no one, anyone 等连用。Nobody knows the truth but Tom.语法：现在进行时一、教材经典句子：I.The children are playing in the park。2.We are staying at Peters house
18、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 ?汪思：1 .一些表示状
19、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
20、 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 homew
21、ork.五、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 力口 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-sittingget-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精品文档欢迎您的下载,资料仅供套考!致力为企业和个人提供合同协议， 策划案计划书，学习资料等等打造全网一站式需求07欢迎下载