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1、精選優(yōu)質文檔-傾情為你奉上Unit 4Topic1 一.重點詞語1. sharewith 與共享2. play with 玩弄，玩耍3. in danger 在危險之中4. feed on 以為食5. think about 考慮，思考6. enjoy nature 享受自然7. at night 晚上8. in the daytime 白天9. summer vacation 暑假10. thousands of 成千上萬11. in fact 事實上12. find out 查明，發(fā)現13. in nature 在自然界二.重點句型.lants are more beautiful tha

2、n animals.植物比動物更漂亮。.The plants stay green longer there.那兒的植物能更長時間保持綠色。.The rainforests are very important to us.（熱帶）雨林對我們很重要。.Water is necessary for all plants.It is the most important thing to all living things,we must save every drop of water.水對所有植物是必需的。它對所有生物都重要，我們必須節(jié)約每一滴水。.Isnt it interesting？是不

3、是很有趣呀？.It is one of the most dangerous fish in the world.它是世界上最危險的魚之一。.It is so strange！太奇怪了！三.語法學習（一.）形容詞的比較級和最高級的構成. 規(guī)則變化：（1.）一般在詞尾加er或est.如：freshfresherfreshest.（2.）以字母e結尾的形容詞，加r或st,如：latelaterlatest.（3.）以重讀閉音節(jié)結尾的詞，詞尾只有一個輔音字母時，應雙寫這一輔音字母，再加er或est.如：bigbiggerbiggest.（4.）以輔音字母y結尾的雙音節(jié)詞，先改y為i，再加er 或es

4、t.如：happyhappierhappiest.（5.）部分雙音節(jié)詞和多音節(jié)詞前面加more或most構成比較級或最高級。如：carefulmore carefulmost careful,beautifulmore beautifulmost beautiful.不規(guī)則變化：good/wellbetterbest,littlelessleast,many/muchmoremost,bad/illworseworst,farfarther/furtherfarthest/furthest.（二.）形容詞的比較級和最高級的用法. 比較級或，經常與than搭配，或給出比較的二個內容。可用much

5、和a little修飾. 三者或三者以上比較用最高級，一般給出比較范圍如：of（in）。(1)例句：Im happier than you.我比你更快樂。Plants are much more beautiful than animals.植物比動物漂亮的多。()例句：The boy is the tallest in my class.這個男孩是我們班最高的。Lesson Two is the most important of all.第二課是所有中最重要的。四.交際用語：學習如何用英語描述和談論我們生存的自然環(huán)境Do you like plants or animals?What ar

6、e you thinking about? Why do you think so?What kind of wild animal is the most dangerous,the tiger,the snake or the bear?Why must we save every drop of water?Topic 2 一. 重點詞語1.take the place of 代替，取代2.instead of 代替，而不是3.mistakefor把錯當4.seem to do 好象，似乎5.call for 要求6.wake sb. up 將某人叫醒7.see sb.doing sth

7、. 看見某人正在做某事8.use sth. for sth./doing sth. 利用某物做某事9.spendon 在上花費時間或金錢10.be sure of 確信11.these days 現在，目前12.in alphabetical order 按字母表順序排列13.look up 查閱14.pay attention to 注意，專心15.begin with 以開始16.and son on 等等17.switch on 開（電燈，機器等）18.ask （sb.）for sth. 向要二重點句型1. Im sure robots can do some work better t

8、han humans. 我確信機器人比人能更好地做某些工作。2. I saw a UFO while I was walking down the street yesterday. 昨天我沿著街道走時，看見了一個不明飛行物。3. It looked like a plate. 它看上去像一個盤子。4. Until now,even the scientists are not sure whether there are UFO. 直到現在，甚至科學家也不確信是否有不明飛行物。5. We can shop without going out of our houses. 我們不出家門就能購物

9、。6. We can use the Internet for finding a job. 我們可以用網絡來找工作。7. We shouldnt spend too much time on it.但是我們不應該在因特網上面花費太多的時間。8. When you look up a word in the dictionary,pay attention to the first letter of the word. 當你在字典里查一個單詞的時候，注意這個單詞的第一個字母。三.語法學習（一.）現在進行時與過去進行時的區(qū)別：.現在進行時表示現在正在發(fā)生或正在做的事情，基本結構be現在分詞。如

10、：肯定句：The robots are making a car now. 這些機器人正在生產小汽車。否定句：We are not studying on the Internet. 我們沒有在互聯(lián)網上學習。疑問句：Is the teacher looking up the word in the dictionary？這個老師正在詞典中查這個詞嗎？特殊疑問句：ho am I talking to？我在和誰談話？.過去進行時表示過去某一時間，正在發(fā)生或正在做的事情。基本結構was（were）現在分詞?？隙ň洌篽en he came in,I was writing a letter.當他進來時

11、，我在寫一封信。否定句：They werent watching TV while she was reading.她讀書時，他們沒在看電視。疑問句：Was the UFO flying to us at 8 last night ?昨晚點UFO向我們飛來了嗎？特殊疑問句：What were you drinking while we were sleeping?我們睡覺時，你們在喝什么？進行時態(tài)往往用在時間狀語從句中，常與when,while等連詞搭配。（二.）be sure結構表示肯定和不肯定。be sure一般用來表示肯定，be not sure（whether/if）表示不肯定。be

12、sure后面可以跟不定式和賓語從句。跟不定式一般譯為“一定”，跟賓語從句，譯為“確信”。如：We are sure to repair the TV well. 我們一定修好這臺電視機。Im sure you can finish your work. 我確信你能完成你的工作。Are you sure whether（if）he switched the computer on? 你確信他打開還是沒有打開電腦？四.交際用語：學習用英語談論現代科技。 Could you tell me something about robots? Can robots take the place of hu

13、mans? Are you sure there are UFOs? Yes,Im sure. No,Im sure whether/if there are UFOs. What do you often do on the Internet?Topic 3重點詞語1. more than 超過2.pull down 推倒，拆毀3.heavy traffic 交通繁忙4.wear out 磨損，用壞 5.used to do sth. 過去常常做某事6.do ones best 盡（某人）最大努力7.live models 真人模型8.the ancient world 古代9.be mad

14、e up of 由組成10.jointogether 把連在一起11.regardas 把看作12.be worn out 被損壞一. 重點句型1.Lots of them were pulled down in the 1960s. 他們當中許多在二十世紀六十年代被拆毀。2.People thought them useless. 人們認為它們沒有用。3.Its really too bad. 這太遺憾了。4.We are doing our best to protect and rebuild the old city walls. 我們正在盡全力保護并重建老城墻。5.It is one

15、 of the“seven wonders”of the ancient world still standing. 它是現存的古代“七大奇跡”之一。6.It took 100,000 people over 20 years to build it. 修建它花了10萬人二十多年的時間。7.Since then,people regarded the Great Wall as a symbol of the Chinese nation. 從那以后，人們就把長城看作是中華民族的象征。8.Every year many people find great pleasure visiting the wall.每年有許多人參觀長城，從中得到極大樂趣。二. 語法學習反意疑問句：由陳述句（或祈使句、感嘆句）加一個簡短問句構成的疑問句叫反意疑問句。實質是前面陳述句的反問句。 一般對應規(guī)