九年級(jí)Unit1Topic2知識(shí)點(diǎn)

1、九年級(jí)Unit1 Topic 2知識(shí)點(diǎn)Topic 2 China has the largest population1.重點(diǎn)語法 現(xiàn)在完成時(shí)常與下列表不明確的狀語連用：1）already 和 yetalready “已經(jīng)”（多用于肯定陳述句），如： He has already gone home. 他已經(jīng)回家了。yet “已經(jīng); 還”（用于否定句或疑問句），如：Have you found him yet? 你已經(jīng)找到他了嗎？I havent finished my homework yet. 我還沒完成作業(yè)。 already 也可用于疑問句，表“出乎意料或驚奇” Have you fin

2、ished your homework already? 難道你已經(jīng)完成作業(yè)了？2)ever 和 neverever “曾經(jīng)”（多用于疑問句，問初次經(jīng)歷），如：I have ever been abroad. 我曾出過國。never“從未；從來不”（多用于否定陳述句），?；卮餰ver的句型。如：I have never seen him before.-Has he ever been abroad? 他曾出過國嗎？-No, never. 不，從來不。3)just “剛剛”（多用于肯定句，位于謂語動(dòng)詞之前），如：I have just tried to call you. 我剛剛打電話給你。4

3、)before “之前”（一般位于句末；常與never呼應(yīng)），如：He says he has never seen such beautiful scenery before. 他說他以前從來沒看過這么美的風(fēng)景。2.get lost “走失”。其中l(wèi)ost 是形容詞。3. 給某人打電話最常用：call sb. 不常用：call sb. up /give sb. a ring ring sb. make a phone call to sb 4.完全倒裝句。其含義為“A如此，B也如此?！笨隙ㄐ问剑浩浣Y(jié)構(gòu)是“so +be/助動(dòng)詞/情態(tài)動(dòng)詞+主語”。 Jim is a student, so is

4、 Tom. 吉姆是一名學(xué)生，湯姆也是。 Jim likes sports, so does Tom. 吉姆喜歡運(yùn)動(dòng)，湯姆也喜歡。Jim can swim, so can Tom. 吉姆會(huì)游泳，湯姆也會(huì)。 否定形式：其結(jié)構(gòu)是“neither/nor + be/助動(dòng)詞/情態(tài)動(dòng)詞+主語”，表示A不怎樣B也不怎樣e.g. Jim wasnt Chinese, neither/ nor were they.吉姆不中國人，他們也不是。 Jim cant speak Japanese, neither can I .吉姆不會(huì)說日語，我也不會(huì)。 Jim didnt go there, neither did

5、I .吉姆沒去那兒，我也沒去。注：前后兩句表達(dá)的是同一個(gè)主體，它指兩者對(duì)同一事物的看法，則不能倒裝，表“A的確如此”。其結(jié)構(gòu)是“so + 主語+ be/助動(dòng)詞/情態(tài)動(dòng)詞” eg: Jim is a good student. So he is. 吉姆是一名好學(xué)生，的確如此。 Jim swims well. So he does. 吉姆游泳很好，的確如此。5. such a beautiful country “如此美麗的國家” 區(qū)別：so: 修飾形容詞或是副詞原級(jí)。 such : 修飾名詞。注意：(1)兩者有時(shí)可以互換：such a nice girl= so nice a girl. (2)

6、名詞前如果出現(xiàn)much, many, little, few等表示數(shù)量的詞時(shí)要用so. e.g.: so many people.這么多人。so little water. 這么少的水。6. It seems that + 從句 = seem to do sth.e.g. I seem to have seen him somewhere before.= It seems that I have seen him somewhere before.我好想曾在什么地方見過他。7. population “人口，居民”，為不可數(shù)名詞常用形容詞large, small 表示人口的多少。（1）“人口

7、的多少”：the population of 例如：The population of the city increased by 2%.（2）“ 的人口”：have a population of +數(shù)量 例如：India has a population of 1.1 billion.（3）對(duì)人口提問的方式Whats the population of? = how large is the population of中國的人口是多少？Whats the population of China? =How large is the population of China?注：人口不能用ma

8、ny/much 修飾， 但是How many people 對(duì)多少人提問這樣是可以的。How many people are there in China? = Whats the population of China?8. China had the largest population in the world. = China had a larger population than any other country in the world. 這里用比較級(jí)結(jié)構(gòu)表示最高級(jí)含義。eg. “李好在他班里是最高的?！盠i Hao is the tallest student in his

9、class. = Li Hao is taller than any other student in his class. =Li Hao is taller than the other students in his class. 9. 區(qū)別：take place 指必然性的“發(fā)生”或有計(jì)劃、安排之內(nèi)的“舉行”。happen 指偶然的、沒有預(yù)料的“發(fā)生“，其結(jié)果往往給人帶來不幸或麻煩。eg: The meeting will take place next Friday. 會(huì)議將在下周五舉行。 The accident happened yesterday. 事故發(fā)生在昨天。 兩者都不用

10、于被動(dòng)語態(tài)。10. increase by “增加了 ”+百分?jǐn)?shù)/倍數(shù) increase to “增加到”+具體數(shù)字 increase from to “從增加到” on the increase “正在增加，不斷增長。eg: The price of oil increased by 29%.油價(jià)漲了29%。 The number of the students in our school has increased to 2530. The population has increased from 1.2 million to 1.8 million. The temperature i

11、s on the increase.溫度正在上升。11.second “位居第二的”India is second with 1.1 billion.= India has the second largest population with 1.1 billion.12.It shows that the population in developing countries is larger than that in developed countries.(1) developing country 發(fā)展中國家 developed country.發(fā)達(dá)國家(2) that 代替the p

12、opulation . that通常替代上文中表示物體的可數(shù)名詞單數(shù)或是不可數(shù)名詞。those 通常替代上文中表示物體的可數(shù)名詞復(fù)數(shù)。eg The weather in Beijing is much colder in winter than that in Guangzhou. The students in our school are smaller than those in your school.13.carry out 實(shí)行，進(jìn)行，執(zhí)行。14. 基數(shù)詞構(gòu)成法：以三位數(shù)字為單位，從后向前用逗號(hào)依次隔開。第一個(gè)逗號(hào)用thousand,第二個(gè)逗號(hào)用million,第三個(gè)逗號(hào)用bill

13、ion.注：dozen, thousand, million, billion 表示具體數(shù)字時(shí)，不能使用復(fù)數(shù)形式，如果使用復(fù)數(shù)形式，則表示不定數(shù)目，與of 連用。 Two dozen, five thousand millions of students billions of books.14.分?jǐn)?shù)表達(dá)法英文分?jǐn)?shù)表達(dá)法：分子為基數(shù)詞，分母為序數(shù)詞，先讀分子后讀分母。當(dāng)分子大于1時(shí)，分母的序數(shù)詞則變?yōu)閺?fù)數(shù)，直接在詞尾加“s”。eg: one fourth / a quarter四分之一； three fourths 四分之三； one second 二分之一； two thirds 三分之二

14、注：分?jǐn)?shù)修飾名詞作主語，謂語動(dòng)詞要和所修飾的名詞保持一致。eg. Two thirds of the students are girls. Three fourths of the meat is left.15.區(qū)別 be short of 表 “缺乏”be short for 表“是的縮寫”,for short “簡稱，縮寫eg: She is always short of money at the end of every month. 每個(gè)月底她總是缺錢。 TV is short for television. TV是television的縮寫形式Y(jié)ou can call him

15、Bob for short.16.so far “到目前為止，迄今為止”，常與現(xiàn)在完成時(shí)連用。 We have learnt over 2000 words so far.17. take measures to to do sth.采取措施做某事18. be known as = be famous as “作為而出名” 以某種身份, 什么樣的產(chǎn)地/地方而出名， be known for = be famous for “因而出名 以某種知識(shí)、技能、作品或特征、特點(diǎn)(產(chǎn)品)而出名，He is famous for his great inventions. France is famous

16、for his fine food and wine.因?yàn)樗膫ゴ蟀l(fā)明，他出名了。 法國的美食和酒是出了名的。He is famous as a great inventor. The town is famous as a wine-producing place.他是著名的偉大的發(fā)明家。 這個(gè)鎮(zhèn)是一個(gè)出名的產(chǎn)酒鎮(zhèn)。17It has worked well in controlling Chinas population. 它在控制人口數(shù)量方面取得了顯著的功效。 work well in doing sth. 表“在方面很有功效”, eg: Doing eye exercises works

17、 well in protecting our eyesight. 做眼保健操在保護(hù)視力方面很有功效。 18.I cant go shopping in big stores unless I travel for a couple of hours.我得花幾個(gè)小時(shí)，才能到大的商場購物。a) unless = if not 表“除非; 如果不”，引導(dǎo)條件狀語從句。 eg: I wont go unless I hear from you. = I wont go if I dont hear from you.如果你不通知我，我就不去。 Unless Bill studies hard, hell fail in the exam. 如果比爾不努力, 他不會(huì)通過考試的.b) a couple of 表 “幾個(gè)人或幾件事”, eg: a couple of years ago 幾年前; a couple of students 幾個(gè)學(xué)生區(qū)別：couple 指任何兩件同類的東西;如: a couple of watches /five couples of ca