【導(dǎo)讀】人們有不同的觀點(diǎn)。，它是我們前輩的經(jīng)歷，但是，即使在今天，它在許多場(chǎng)合仍然。，它們給我們的日常生活帶來(lái)了許多危害。很普遍，許多人喜歡……它既有有利的一面，也有不利的一面。人們的觀點(diǎn)各不相同，一些人認(rèn)為（說(shuō)）……，在他們看來(lái)，……已成為人的關(guān)注的熱門(mén)話(huà)題，特別是在年青人當(dāng)中，將引發(fā)激烈的辯論。在我們的日常生活中起著越來(lái)越重要的作用，它給我們帶來(lái)了許多好處，但同時(shí)也。引發(fā)一些嚴(yán)重的問(wèn)題。對(duì)我們國(guó)家的發(fā)展和建設(shè)是必不可少的，（也是）非常重要的。的主要原因是由于……者相比較，我更傾向于（喜歡）……

　　

【正文】 west before they saw a village. 他們西行 50 英里才看到一個(gè)村莊。 The workers worked day and night about three days before everything returned to normal. 工人們連續(xù)工作 3 天才使一切恢復(fù)正常。 He almost knocked me down before he knew it. 他幾乎撞到我了才意識(shí)到。 We had walked a long way before we found some water. 我們走了很長(zhǎng)的路才找到一點(diǎn)水。 Five years went by before I knew it. 不知不 覺(jué)，五年過(guò)去了。 句型 9 It was + 時(shí)間段 +before….― 過(guò)了多久才（怎么樣） ……‖ It was not long before….― 不久，就 ……‖ It will (not) be +時(shí)間段 +before….― 要過(guò)多久（不久） …… 才 ……‖(before 從句謂語(yǔ)動(dòng)詞要用一般時(shí)態(tài) ) [例句 It was not long before he sensed the danger of the 危險(xiǎn)。 It was five days before he came back. 五天后他才回來(lái)。 It will be half a year before you graduate from the school. 再過(guò)半年你才能畢業(yè)。 It will not be long before they understand each other. 他們大概不久就會(huì)互相了解。 句型 10 in case of…(+n.) ― 以防；萬(wàn)一 ‖； in case that…― 以防，萬(wàn)一 ……‖ （謂語(yǔ)動(dòng)詞 用一般現(xiàn)在時(shí)態(tài)或 should+動(dòng)詞原形） [例句 In case of fire, what should we do? Please remind me about it in case I fet/should fet. 萬(wàn)一我忘了，請(qǐng)?zhí)嵝盐摇? In case (that) John es/should e, please tell him to wait. Please take your umbrella in case (that it rains/should rain).帶上雨傘，以防下雨。句型11 It 強(qiáng)調(diào)句型 強(qiáng)調(diào)句的基本構(gòu)成： It is/was + 被強(qiáng)調(diào)的部分 + who（主要指人時(shí)） /that + 其余部分 [注意 這種結(jié)構(gòu)可以強(qiáng)調(diào)句子的主語(yǔ)、賓語(yǔ)、狀語(yǔ)（包括時(shí)間，地點(diǎn)，方式，原因等），但是不能強(qiáng)調(diào)謂語(yǔ)動(dòng)詞（參考句型 15）。 原句的謂語(yǔ)動(dòng)詞如果是現(xiàn)在或?qū)?lái)時(shí)態(tài)，用 It is…that/who…. ； 原句的謂語(yǔ)動(dòng)詞如果是過(guò)去時(shí)態(tài)，用 It was…that/who…. ； 強(qiáng)調(diào)時(shí)間、地點(diǎn)、原因或方式時(shí)不要用 when, where 或 how, 必須用 that。 [例句 I saw him in the street yesterday afternoon. →It was I who saw him in the street yesterday afternoon. （強(qiáng)調(diào)主語(yǔ)） →It was in the street that I saw him yesterday afternoon. （強(qiáng)調(diào)地點(diǎn)狀語(yǔ)） →It was yesterd ay afternoon that I saw him in the street.（強(qiáng)調(diào)時(shí)間狀語(yǔ)） →It was him that/who I saw in the street yesterday afternoon. （強(qiáng)調(diào)賓語(yǔ)） [例句 He didn‘t go to bed until his mother came back. →It was not until his mother came back that he went to bed. He didn‘t do his homework until his father came back from work. →It wasn‘t until his father came back from work that he did his homework. [例句 Only when you nearly lose someone do you fully realize how much you value him. →It is only when you nea rly lose someone that you fully realize how much you value him. 只有你快要失去某個(gè)人時(shí)，你才意識(shí)到你是多么尊重他。 [例句 I was late again because the traffic was very heavy during the rush hour. →It was because the traffic was very heavy during the rush hour that I w as late again. （強(qiáng)調(diào)句中只能強(qiáng)調(diào)由 because 引導(dǎo)的原因狀語(yǔ)從句， because 不能換成 since, as, for, now that 等） [注意強(qiáng)調(diào)句的疑問(wèn)結(jié)構(gòu) 一般疑問(wèn)句 Is / Was it +被強(qiáng)調(diào)部分 +who / that …? 特殊疑問(wèn)句 特殊疑問(wèn)詞 +is /was +it +who / that…? What is/was it that…? Who is/was it that…? When is/was it that…? Where is/was it that…? Why is/was it that…? How is/was it that…? [例句 I saw him in the street yesterday afternoon. →When was it that you saw him in the street? →Who was it that you saw in the street yesterday afternoon? →Where was it that you saw him yesterday afternoon? [例句 I don‘t know when he will e back. →I don‘t know when it is that he will e back. （賓語(yǔ)從句疑問(wèn)詞后用陳述句語(yǔ)序） –How was it that you got in touch with Mr. Smith? 你是怎么和 Smith 先生聯(lián)系上的？ –Trough a friend of mine. 通過(guò)一個(gè)朋友。句型 12 （ 1）、祈使句（表?xiàng)l件） + or/or else/ otherwise + 主句（表結(jié)果） … ― 否則 … ，要不然 …‖ （ 2）、祈使句（表?xiàng)l件） + and +主句（表結(jié)果） [例句 Hurry up, or you‘ll be late for class. Please call me up before you e, otherwise/or else/or we might be out. 你來(lái)之前打個(gè)電話(huà)，否則，我們也許會(huì) 出去。 Think it over and you will find the answer. Give him an inch and he will take a mile. 得寸進(jìn)尺。 Work hard and you will make progress every day. 好好學(xué)習(xí)，天天向上。 句型 13 …until….― 直到 …… 時(shí)候 ‖； not…until…― 直到 …… 才 ……‖ [例句 You are to stay until/till your mother es back. 你得等到你媽媽回來(lái)。 The meeting was put off until ten o‘clock. 會(huì)議推遲到十點(diǎn)鐘。 The villagers didn‘t realize how serious the pollution was until all the fish died in the river. →Not until all the fish died in the river did the villagers r ealize how serious the pollution was.（倒裝句） 等到湖里的魚(yú)全死光了，村民們才意識(shí)到污染是多么嚴(yán)重。 He didn‘t go to bed until his mother came back. →It was not until his mother came back that he went to bed. （強(qiáng)調(diào)句） Not until he failed in the exam did he realize that he had wasted much time playing puter games. Not until his son came back from school did he go to bed. 句型 14 unless…― 除非，如果不 ……‖(=if…not) [例句 I shall go tomorrow unless it rains. 如果不下雨，我明天去。 –Shall Tom go and play football? –Not unless he has finished his homework. 除非他完成作業(yè)，否則不能出去。 I won‘t go unless he es to invite me himself. 除非他本人來(lái)邀請(qǐng)我，不然我是不會(huì)去的。 I won‘t attend his birthday party unless invited (=unless I am invited). 除非被邀請(qǐng)，否則我不 去參加的生日晚會(huì)。 句型 15 when 引導(dǎo)的從句 when 除了用來(lái)引 導(dǎo)主語(yǔ)從句、賓語(yǔ)從句、時(shí)間狀語(yǔ)從句、表語(yǔ)從句和定語(yǔ)從句，還有一種用法值得關(guān)注，那就是 when 引導(dǎo)并列分句，意思是 ―這時(shí)突然；就在那時(shí) ‖，強(qiáng)調(diào)另一個(gè)動(dòng)作的突然發(fā)生。常用于以下句型中：（ 1）、主語(yǔ) + be doing… when… 意思是 ―正在做某事這時(shí) ……‖ ；（ 2）、主語(yǔ) + be about to do…when… ；（ 3）、主語(yǔ) +be on the point of (doing) …when… 意思是 ―正要去做某事這時(shí) ……‖ [例句 One day Chuck was on a flight across the Pacific Ocean when suddenly his plane crashed. 有一天， Chuck 正在太平洋上飛行，這時(shí)他的飛機(jī)突然爆炸了。 I don‘t know when he will arrive. 我不曉得他什么時(shí)候到達(dá)。 I thought of the happy days when I was in Beijing. 我想起了在北京時(shí)的那段快樂(lè)日子。 I believe the time will soon e when there will be no weapons in the world. 我相信世界上沒(méi)有武器的日子不久就會(huì)到來(lái)。 I was walking along the river when I heard a drowning boy cry for help. 我正在河 邊行走，這時(shí)我突然聽(tīng)到一個(gè)落水男孩求救。 I was about to leave