深圳牛津英语七年级英语下册第四单元-第一课时

精品文档 1欢迎下载1欢迎下载1欢迎下载1欢迎下载1欢迎下载 UnitUnit 4 4 SaveSave thethe treestrees 第一课时第一课时 一 核心词汇一 核心词汇 1 save v 拯救 2 pine n 松树 3 discuss v 讨论 4 branch n 树枝 5 root n 根 6 fight v 与 作斗争 7 against v 反对 8 example n 例子 9 harmful adj 有害的 10 gas n 气体 11 produce v 产生 12 oxygen n 氧气 13 major adj 主要的 14 convenient adj 方便的 15 furniture n 家具 16 imagine v 想象 17 disease n 疾病 18 dig v 挖 19 hole n 洞 20 carry v 搬 21 container n 容器 二 重点短语二 重点短语 1 fight against 对抗 与 作斗争 2 help sb do sth 帮助某人做某事 3 know about 知道 了解 4 in many ways 在很多方面 多角度 5 take in 吸收 理解 6 come from 来自 be from 7 for example 例如 8 in fact 事实上 确切地说 9 look around 环顾四周 10 be made of 由 制成 11 millions of 大量的 12 be good for 对 有好处 三 基础知识点三 基础知识点 1 If I plant this seed in the ground will it become a pear tree Hi 1 ifif 引导条件状语从句引导条件状语从句时 意为 如果 主句 包括祈使句和含有情态动词 can may must 等的句子 用一般现在时 从句也用一般现在时 主句用过去时 从句也用过去的某种时态 如 果主句是一般将来时 从句要用一般现在时表示将来 Eg We will go out if it is fine tomorrow You must see a doctor if you are ill 2 a a 不定冠词不定冠词 意为 一 个 用在以辅音音素开头的单数可数名词前 在以元音音素 开头的单数可数名词的前面要用不定冠词 an 不定冠词 a an 常放在单数可数名词前 表示一个 不确定的事物或人 其用法如下 第一次提到某人或某物时 用不定冠词 Eg You d better go to see a doctor 表示某一类中的任何一个 是泛指 Eg A dog is a useful animal 表示 一 的数量 但数的概念没有 one 强烈 Eg I have a pen a pencil and two books 用在表示时间 重量 速度 价格等名词前 意为 每一 Eg We have six English classes a week 2 LookLook aroundaround this room 与 look 相关的短语 look for 寻找 look over 仔细检查 翻阅 look after 照顾 look up 抬头看 3 A lot of furniture is made of wood 很多家具都是由木头制成的 be be mademade ofof 看得出原材料 be made from 看不出原材料 意为 由 制成 如 The chair is made of wood 这把椅子是由木头制成的 Paper is usually made from wood 纸通常由 木头制成 4 But we cut down millions of trees every year 但每年我们都会砍伐数百万的树木 精品文档 2欢迎下载2欢迎下载2欢迎下载2欢迎下载2欢迎下载 millionsmillions ofof 意为 数以百万计 大量的 如 Millions of people around the world learn English 全世界无数人在学习英语 拓展 hundreds of 数以百计的 成千上万的 thousands of 数以千记的 成千上万的 tens of thousands of 数以万计的 hundreds of thousands of 数以十万记的 注意 hundred thousand million billion 等前面有具体的数词时 其后不加 s 也不带介词 of Eg two hundred 200 5 She can skate at a very high speed because sh practises a lot PractisePractise 及物动词 意为 训练 练习 宾语可以是名词 代词或动名词 Eg You must practise speaking English every day 6 As a result the number of kinds of animals birds insects and trees in the world is decreasing TheThe numbernumber ofof 意为 的数量 Eg The number of the students in our class is 50 拓展 The number of 的数量 后接复数名词 但谓 语动词要用单数形式 常跟 large small 等 词作表语 The number of the students in our school is 2000 A number of 大量 许多 相当于 many 接复数名词作主语时 谓语动词用复数形式 Number 前可加 small large huge 等表示程度 A number of students are playing football 7 but the speaker did not stop speaking until twenty past twelve Not Not Until Until 意为 直到 才 主句的动词一般是非延续性动词 它所表示的动作直 到 until 所表示的时间才发生 Eg You cannot leave until your work is finished 知识练习 知识练习 1 1 根据句意及首字母提示完成单词 根据句意及首字母提示完成单词 1 Today we are going to d the topic Are dogs people s friends 2 Look at the dog It is hurt Shall we s It 3 The b of the trees connect with each other and pass water and food underground 4 You mustn t park your car here It is a the law 5 The workers are f against the decision to reduce their pay 6 I cannot i life without trees 7 Soft drinks are h to your health 8 The f in the room is quite old 2 2 选出可以替换划线部分的选项 选出可以替换划线部分的选项 1 We can produce fresh water from the ocean now A get B work C make D take 2 Life is more convenient than before A easier B harder C the easiest D the hardest 3 Trees are important because they can take in harmful gases A make B absorb C stop D put 4 You can do many things at home For example you can do some housework A For instance B For more C For ever D For you 5 In fact I didn t listen to our teacher carefully 精品文档 3欢迎下载3欢迎下载3欢迎下载3欢迎下载3欢迎下载 A Really B Actually C Exactly D Certainly 3 3 单项选择单项选择 1 The doctor gave him some pills to the pain A take off B take in C take on D take away 2 Do some sports every day It will help you keep A healthy B healthily C kindly D excitedly 3 There are people here in our city Actually there are people here in our city A millions of three million B millions of millions C millions of three million of D million of three million of 4 What time is it now It is 20 00 I think we should stop first A having supper B have supper C to have supper D to having supper 5 I bought furniture Really What A a new is it made of B a new does it made of C a new piece of is it made of D a new piece of does it made of 6 Look at this old bridge It is made stones A from B of C into D up 7 I the swimming club if you it A join join B will join join C join will join D will join will join 8 He heard someone calling his name so he stopped and But he couldn t see any one A looked around B looked up C looked into D looked for 9 We can t live without trees They make our lives I agree We should stop people trees A convenient to cut down B conveniently to cut down C convenient cutting down D conveniently cutting down 10 the little dog helps his owner many ways his daily life A in at B on in C in in D on on 4 4 用所给单词的适当形式填空 用所给单词的适当形式填空 1 Trees are important in our day lives 2 There are many people in this hall than that one 3 We all know that smoking is harm to our health 4 Air is a mixture 混合物 of gas 5 Mr Green lives in a convenience life 6 Tim has been a fire fight for five years 精品文档 4欢迎下载4欢迎下载4欢迎下载4欢迎下载4欢迎下载 7 How does a fish breath under water 8 Many plants died because of the water pollute 5 5 完形填空完形填空 A Chinese man 1 Cai Lun invented paper almost 2 000 years ago He made paper 2 wood He then put all the paper together and made the paper 3 a book Now we still use wood to make paper We use a lot of paper every day If we keep on 4 so much paper there will not be any trees left on the earth If 5 no trees there will be no paper Every day people 6 about 2 800 tons of paper We use 17 trees to make one ton of paper This means we are cutting nearly 48 000 trees every day Since it 7 more than 10 years for a tree to grow we must start using 8 paper now So how can we save paper We can use both sides of 9 paper especially when we are making notes We can choose drinks in bottles instead of those in paper packets We can also use cotton handkerchiefs 手帕 but not paper ones When we go shopping we can use fewer paper bags If the shop assistant gives us a paper bag we can save it and reuse it later Everyone can help to save paper If we all think carefully we can help 10 trees But we should do it now before it is too late 1 A call B calls C called D calling 2 A from B of C into D for 3 A from B of C into D for 4 A waste B to waste C wasted D wasting 5 A there will be B there are C there was D there wasn t 6 A take in B put on C throw away D put away 7 A spends B takes C costs D pays 8 A many B few C fewer D less 9 A a B a piece C one piece D many 10 A protect B protects C protecting D to protecting 6 6 阅读理解阅读理解 Can trees talk Yes but not in words Scientists have reason to believe that trees do communicate with each other Not long ago researchers learned some surprising things First a willow tree 柳树 attacked in the woods by caterpillars 毛毛虫 changed the chemistry of its leaves and made them tasteless so that the caterpillars got tired of the leaves and stopped eating them The even more astonishing the tree sent out a special vapor a signal causing its neighbors to change the chemistry of their own leaves and make themselves taste also terrible too Talking of course doesn t need to be always in words We can talk to each other by smiling raising our shoulders and moving our hands We know that birds and animals use a whole vocabulary of songs sounds and movements Bees dance their signals flying in certain patterns that tell other bees where to find nectar 花蜜 精品文档 5欢迎下载5欢迎下载5欢迎下载5欢迎下载5欢迎下载 for honey So shy shouldn t trees have ways of sending messages 1 From the passage which kind of leaves don t caterpillars eat A leaves lying on the ground B leaves having an unpleasant taste C leaves bees don t like D leaves having an unfamiliar shape 2 The willow tree described in the passage protected itself by A growing more branches B talking with birds and bees C changing its leaf chemistry D shaking caterpillars off 3 According to the passage the willow tree was able to talk with other trees by A Waving its branches B giving off a special smell C dropping its leaves D changing the colour of its trunk 4 According to the passa