英语九年级上册Unit 2 Saving the earth.Topic 2 All these problems are very serious.教学ppt课件

这是一份英语九年级上册Unit 2 Saving the earth.Topic 2 All these problems are very serious.教学ppt课件，文件包含59Unit2Topic2单元小结课件ppt、59Unit2Topic2单元小结doc等2份课件配套教学资源，其中PPT共48页， 欢迎下载使用。


2. All these problems are very serious. 单元小结
英语（仁爱版）
九年级上册
Unit 1Unit 2 Saving the earth
English
01
重点单词
1.sand [sænd] n.沙，沙子2.sandstorm ['sændstɔ:m] n.沙尘暴 3.rainstorm 暴风雨 4.snowstorm 暴风雪5.storm 暴风6.change…into… 转换成，把……变成7.desert ['dezət] n.沙漠v.舍弃,遗弃8.human being ['biɪŋ] n. 人9.although [ɔ:l'ðəʊ] conj.虽然，尽管= though 10.reduce [rɪ'dju:s] v.减少；减轻
11.completely [kəm'pli:tli] adv.彻底地；完整地12.complete adj. 完全的13.user ['ju:zə] n.使用者；用户14.use v.&n. 使用15.reuse [,ri:'ju:z] v.再次使用;重复使用16.none [nʌn]pron.没有一个；毫无17.nobody ['nəʊbədi]pron.没有人18.nothing 没事19.nowhere [nəʊ'weə] adv.无处;哪里都不20.rubbish ['rʌbɪʃ] n. 垃圾，废弃物
21.here and there在各处；到处=everywhere 22.spit [spɪt] v.吐，唾23.wild [waɪld] adj.野的，野生的24.untidy [ʌn'taɪdi] adj.不整洁的,凌乱的25.tidy adj.整洁的26.worst  [wə:st] adj.最差的，最糟的27.rude [ru:d] adj.无理的，粗鲁的28.behavior [bɪ'heɪvjə] n.行为，举止29.situation [,sɪtʃu'eɪʃn] n.状况;形势;局面30.punish ['pʌnɪʃ] v.处罚,惩罚
31.perhaps [pə'hæps] adv.可能,大概32.everybody ['evribɒdi] pron.人人,每个人33.everyone 每个人34.everything 每件事35.take away 拿走36.take 相关词组及用法：37.take 拿走，带走38.take up 占据39.take …to … 把…带到…40.take place 发生
41.take the place of 代替42.take one’s place 代替某人43.take turns to do sth 轮流做某事44.take measures to do sth采取措施做某事45.take action to do sth 采取行动做某事46.take a breath 吸一口气47.oxygen ['ɒksɪdʒən] n.氧气48.hole [həʊl] n.洞,坑49.ozone layer ['əʊzəʊn 'leɪə] 臭氧层50.radiation [,reɪdi'eɪʃn] n.放射，放射物
51.directly [də'rektli] adv.直接地52.direct adj.直接的53.indirect adj.间接的 54.indirectly adj.间接地55.carbon dioxide ['kɑ:bən] [daɪ'ɒksaɪd] 二氧化碳56.form  [fɔːm] v. 出现，使形成 n. 种类；形式57.blanket ['blæŋkɪt] n.毛毯，毯子58.escape [ɪ'skeɪp] n.&v.逃跑；逃脱 (from)59.rise [raɪz] v.上升，上涨60.the greenhouse effect [ðə]['gri:nhaʊs][ɪ'fekt]温室效应
61.refer [rɪ'fɜ:] [tʊ] 提到，涉及，有关62.shortage ['ʃɔ:tɪdʒ] n.不足;缺少;短缺63.short 短的，矮的 64.shorts 短裤65.avoid [ə'vɔɪd] v.防止,避免 66.avoid doing sth.67.resource [rɪ'sɔ:s] n.资源,财力68.source [sɔ:s] n.来源,出处;起源;源头69.discover [dɪ'skʌvə] v.发现,找到70.discovery n. 发现
71.thirsty ['θɜ:sti] adj.缺水的,渴的72.nearly  ['nɪəlɪ] adv.几乎，将近73.law [lɔ:] n.法律，法令；定律74.lawyer 律师
【典例分析】1.desert ['dezət] n.沙漠v.舍弃,遗弃 change into desert 变成沙漠【典例分析】2. sandstorm ['sændstɔ:m] n.沙尘暴 【技巧总结】sandstorm ['sændstɔ:m] n.沙尘暴 rainstorm n.暴风雨 snowstorm n.暴风雪
重点单词讲解
【典例分析】3.although [ɔ:l'ðəʊ] conj.虽然，尽管= though although conj. “虽然，尽管”，引导让步状语从句，相当于though, although比较正式。e.g. Although/Though he is very tired, he goes on with his work.【技巧总结】在句中使用although或though时，不能同时使用but, 但although/though后可与yet或still连用。 加强语气时， 可用even though.【典例分析】4.user ['ju:zə] n.使用者；用户；use v.&n. 使用； useful adj. 有用的. reuse [,ri:'ju:z] v.再次使用;重复使用
【典例分析】5.save用法1）贮存、保存e.g. Forests can save a lot of water.　save sb sth＝save sth for sb 为某人保留…2）节省、节约，避免（金钱、时间等）浪费e.g. We should save time.3）救，挽救save one’s life 挽救某人的命e.g. He saved his friend’s life in the accident.
【典例分析】6. rubbish ['rʌbɪʃ] n. 垃圾，废弃物 leave rubbish here and there 乱扔垃圾【典例分析】7.wild [waɪld] adj.野的，野生的 wild animals 野生动物【典例分析】8.untidy [ʌn'taɪdi] adj.不整洁的,凌乱的; tidy adj.整洁的
【典例分析】9.worst  [wə:st] adj.最差的，最糟的 worst of all 最糟糕的是，用来引出最坏的事。【典例分析】10. none [nʌn] pron.没有一个；毫无 none 指三者或三者以上的“没有，都不”，既可指“人”，也可指“物”，常与of连用，既可修饰可数名词，也可修饰不可数名词，构成“none of+代词” 结构，当名词是不可数时，谓语动词用第三人称单数，当名词是复数时，谓语动词用单复数均可。 e.g. None of those buses go(es) there. 没有一辆公共汽车去那里。
2）can’t bear doing sth 难以忍受做某事e.g. I can’t bear working here. 我难以忍受工作在这里.【典例分析】11.deaf [def] adj.聋的 go deaf 变聋；be deaf to sth 对......充耳不闻e.g. People who work and live in noisy conditions often go deaf. 工作和生活在嘈杂环境里的人们经常变聋.【典例分析】12. hearing ['hɪərɪŋ] n.听力，听觉; loss [lɒs] n.丧失，损失，丢失 lose one’s hearing = have hearing loss 丧失听力
【技巧总结】no one 指“人”，不与of连用,谓语动词用单数. e.g. No one likes noise. 没人喜欢噪音.【典例分析】11.direct adj.直接的 v. 指挥，指示. directly adv. 直接地 = direct ＋ly director n.导演; direction n.方向，指导
【典例分析】12. rise 是不及物动词，意为：升起；上升e.g. The sun rises in the east 太阳从东方升起．【技巧总结】raise 是及物动词，意为＂举起；抬起，提高＂e.g. Please raise your hands. 请举起手。
【典例分析】13. escape n.&v.逃跑；逃脱 (from)escape sth/doing sth 逃脱（做）某事e.g. He is very lazy. He often escapes the study. 他很懒，经常逃脱学习。The man escaped doing the work. 这个男人经常逃避工作 escape…from… 从…逃脱e.g. The boy escaped successfully from that big fire.这个男孩成功地从火灾中逃脱。
【典例分析】14. avoid v.防止,避免 avoid + sth. / doing sth. 避免做某事e.g. He avoided answering my questions. 他拒绝回答我的问题。【技巧总结】后加doing sth的动词有：avoid/practice/ finish/discourage/enjoy /imagine/keep/mind/prevent/regret/spend/consider(考虑)
【典例分析】15. discover v. 发现 探索; discovery n. 探索 发现 【技巧总结】find, discover 及invent的区别A. find是较非正式用词,表示找到或发现的意思。e.g. Please find my hat for me.B. discover指通过有意识地寻找或查询,发现某种已经存在的现象或事物。e.g. It was Columbus who discovered America in 1492.C. invent则表示发明以前不存在的东西。e.g. Alexander Bell invented the telephone in 1876.
【典例分析】16.nearly  ['nɪəlɪ] adv.几乎，将近【技巧总结】nearly 与almost 区别 ： almost 多表示时间、程度、距离、进度， 且almost 可以修饰more than, too, nothing, nobody, nowhere, no one, none, never 等词，nearly 则不行。nearly只与not连用。 e.g. I have almost never seen him. I nearly didn’t hear what the teacher said in class.
02
重点短语
1.刮大风 blow strongly/hard 2.沿着街道走walk down the street3. 砍倒，砍下cut down4. 把…变成 change into = turn into 5.阻止..做某事 stop/keep/prevent sb from doing sth 6.把…吹/刮走 blow sth. away 7.把…冲走，把…洗掉 wash sth. away8.对...有害 be harmful to = do harm to 9.需要做某事 need to do sth 10.许多，大量 a large number of
11.尽某人最大努力做某事 try one’s best to do sth 12.在将来 in the future13.形成，产生 come into being14.处于...危险中 be in danger of 15.灭绝 die out16.许多，大量 plenty of 17....的重要性 the importance of18.越来越少 fewer and fewer19.在过去 in the past20.结果 as a result
21.一些有用的东西 something useful22.我们中没有人 none of us23.到处 here and there24.在公共场合 in public25.爱护野生动物 care for wild animals26.最糟糕的是 worst of all27.制定规则 make rules28.遵守规则 follow the rules29.违反规则 break the rules30.带走 take away
31.臭氧层 the ozone layer32.二氧化碳 carbon dioxide33.温室效应 the greenhouse effect34.指的是 refer to35.海平面 the level of the oceans36.直接到达地球 reach the earth directly37. 缺乏…… be short of38. 在地球上 on the earth39. 用某物做某事 use sth for sth/doing sth40. 避免某事 avoid sth
41. 取得（一些）进步 make (some) progress42. 在这个领域 in the field43. 一天天 day by day44. 似乎/好像做某事 seem to do sth45. 大量的 plenty of 46. 带走、拿走 take away47. ……的缺乏 the shortage of
【典例分析】1.cut down 砍伐，缩短e.g. cut down the trees＝cut the trees down 砍树注意：cut it/them down 动副结构，代词必须放中间，且用宾格【技巧总结】cut in 插嘴，打断（说话）cut off 切断（电源，水）；中断cut out 剪下；删去cut up 切碎
重点短语讲解
【典例分析】2. change …into= turn… into 把…变成…e.g. Heat can change water into steam. 加热能使水变成蒸汽。 They are changing desert into field. 他们正在使沙漠变成农田。【典例分析】3. stop sb./sth. (from) doing sth. = prevent sb./sth. (from) doing sth. = keep sb./sth. from doing sth. 阻止…做某事（from不能省略）e.g. The heavy rain prevented us from going out. =The heavy rain stopped us from going out.=The heavy rain kept us from going out. 大雨阻止我们出去.
【典例分析】4. a number of + 可数名词复数 + 谓语动词复数, 许多，大量 the number of + 可数名词复数 + 谓语动词单数, ...的数量是 e.g. There are a number of cars in the parking lot. The number of the cars is about 200.停车场停了大量的车。车的数量大约是200。【典例分析】5. be in danger of 处于…的危险中e.g. Some animals are in danger of dying out. 一些动物处于灭绝的危险中.
【典例分析】6. as a result 结果 e.g. As a result , we were all late for school. 结果，我们都迟到了。【技巧总结】as a result of… 由于…e.g. As a result of careless，she didn’t pass the exam. 由于粗心大意，她没有通过考试【典例分析】7. something useful 有用. adj修饰不定代词时，放在后面，作后置定语。 somewhere warm 一些暖和的地方； nothing serious 没什么严重的
【典例分析】8. here and there = everywhere 到处，处处e.g. I have looked for my key here and there, but I can’t find it. 我到处找我的钥匙，但就是找不到。 【典例分析】9. take away 拿走，取走e.g. I don't like these books. Please take them away. 我不喜欢这些书，请把它们拿走
【技巧总结】1)take up 占据2)take …to … 把…带到…3)take place 发生4)take the place of 代替5)take one’s place 代替某人6)take turns to do sth 轮流做某事7)take measures to do sth采取措施做某事8)take action to do sth 采取行动做某事9)take a breath 吸一口气
【典例分析】10. refer to 谈及，说起；指的是e.g. Our planet refers to the Earth. 我们的 星球指的是地球。
03
重难点详解
1.What bad weather! 多么糟糕的天气啊！ What+形容词+不可数名词/可数名词复数！ What+ a/an+形容词+可数名词单数！ e.g. What a busy day！多么繁忙的一天呀！ What beautiful flowers! 多么美丽的花啊！【典例分析】2. Cutting down trees is harmful to human beings, animals and plants. 滥伐树木对人类动植物都有害处。 动名词做主语，谓语动词用单数e.g. Doing exercise is good for our health. 做运动有助于我们的健康。
【典例分析】3.None of us likes pollution. 没有人喜爱污染 none的用法1)可与of连用；2)谓语动词用单或复数；3)具体指什么人或物；4)一般用来回答how many +n, how much +n及含any +n引起的疑问句。 e.g. None of us is English. 我们中没有人是英国的。 【技巧总结】no one的用法1)不与of连用；2)谓语动词用单数；3)只能指人，但不具体指什么人；4)一般用来回答who,及含anyone, anybody引起的疑问句。 e.g. No one likes pollution. 没人爱污染。
【典例分析】4.We should do everything we can to protect the environment.我们应当尽一切努力保护环境句中we can是修饰everything 的定语从句，省略了关系代词that及从句中的谓语do，意为“ 一切能做的事” ”e.g. We should do everything we can to learn English well.【典例分析】5.Everyone should care for wild animals and plant more trees .每一个人都应该爱护野生动物，种更多的树。 care for=take care of=look after 照顾，照料e.g. Jim has to look after his brother because his mother is not at home.
【典例分析】6. Too much harmful radiation from the sun passes through the hole and reaches the earth directly.through prep.穿越，从……中间穿过 e.g.The two friends were walking through the forest.across prep.横跨……，横穿 e.g.The Great Green Wall is across the northwest of China.cross v. 横穿，如横过马路、过桥、过河等。e.g. Be careful when you cross the street.
【典例分析】7. The sea seems to have the best answer. seem用法（1）It seems that+从句 ,似乎，好像 e.g. It seems that their living conditions are very good. 他们的生活条件似乎很好。（2）主语+seem to do sth, 似乎，好像e.g. She seems to pass the test. 她似乎通过了考试。（3）主语+seem+形容词, 似乎，好像e.g. He seems very happy. 他似乎很开心。
04
重点语法
不定代词和不定副词【要点1】　常见的复合不定代词、不定副词:somebody, something, somewhere用于肯定句; anybody, anyone, anything, anywhere 用于否定句或疑问句。如:I have something to tell you. Does anybody live on the island?【要点2】　形容词修饰复合不定代词时,要放在所修饰词的后面,作后置定语。如:There is nothing serious.Is there anything interesting in today’s newspaper?
【要点3】　复合不定式作主语时,谓语动词常用单数。如:Everyone likes English.Everything goes well.【要点4】　不定代词none, neither的用法。none指 “三者或三者以上都不”,作主语时谓语动词用单数或复数均可,常和of 连用构成none of...结构;neither 指“两个人或物中一个也不,两者都不”。如:None of the books are/is interesting.I know neither of the two men.
【要点3】　复合不定式作主语时,谓语动词常用单数。如:Everyone likes English.Everything goes well.【要点4】　不定代词none, neither的用法。none指 “三者或三者以上都不”,作主语时谓语动词用单数或复数均可,常和of 连用构成none of...结构;neither 指“两个人或物中一个也不,两者都不”。如:None of the books are/is interesting.I know neither of the two men.
【复合不定代词/副词】
【不定代词】