发布时间 : 星期一 文章jiaoan更新完毕开始阅读
百年后，查尔斯·巴比奇才把我制成了一台分析机。
【句法分析】本句中before 引导时间状语从句。before引导时间状语从句时可以根据语境译作“过了??(时间)才??，还没来得及??就??，不知不觉就??”。
①“It was＋时间段＋before...”表示“过了多久 才??”。从句常用一般过去时。
②“It was not long before...”意为“不久就??”。 从句常用一般过去时。
③“It will not be long before...”表示“不久就 会??”。从句常用一般现在时。
④“It will be＋时间段＋before...”表示“要过多久 才??”。从句常用一般现在时。 【例句研读】
It was a long time before I went to sleep last night. 昨天夜里过了很久我才睡着。
He had got in the train before I could say goodbye. 我还没来得及说再见，他已经上了火车。 It was three days before he came back. 过了三天他才回来。
It was not long before he got a rise in the company. 不久他在公司就升了职。
It will not be long before we get used to the new school life.不久我们就会习惯新的学校生活。
【考点聚焦】before的用法 【即时巩固】 完成句子
①不久，她就把一切都准备好了。
she got everything ready. ②我还没来得及说句话，他就冲出了房间。
，he had rushed out of the room.
【答案】 ①It was not long before ②Before I could say a word 考点2 as引导的时间状语从句
【教材原句】As time went by，I was made smaller.(P18) 随着时间的推移，我被做得更小了。
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【句法分析】句中as为连词，意为“随着”，引导时间状语从句。
【提示】 as与with均可表示“随着”，但词性不同。as是连词，引导时间状语从句；with是介词，后接名词/代词＋分词构成with的复合结构。
①as用作从属连词，表示“既然，因为”，引导原因状语从句。
②as用作从属连词，表示“虽然”，引导让步状语从句，只用于倒装语序，即把作表语的形容词、名词或作状语的副词以及动词原形置于句首。
③as用作关系代词，引导定语从句，可放于句首、句中或句末。 【例句研读】
As time goes on，it's getting warmer and warmer. 随着时间的推移，天气变得越来越暖和了。
As housing price is going up fast，ordinary people find it harder to afford one. ＝With housing price going up fast，ordinary people find it harder to afford one. 随着房价的迅速攀升，普通人发现支付一套房子越来越难了。 As we're both tired，let's just grab a takeaway. 我们俩都累了，来吃点外卖食品吧。
Try as she might，Sue couldn't get the door open. 无论苏怎样努力，她就是打不开门。 【考点聚焦】as引导的时间状语从句 【即时巩固】 选择题
He smiled politely Mary apologized for her drunken friends.
A．as C．unless 【答案】 A
B． if D． though
完成句子
①随着时间的流逝，他已经改变了许多。
，he has changed a lot. ②管已经很疲惫了，学生们仍继续练习。
Tired ，the students went on practising. 【答案】 ①As time went by/With time going by ②as they were 考点3 so...that...“如此??以至于??”，引导结果状语从句
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【教材原句】Over time my memory has developed so much that，like an elephant，I never forget anything I have been told！(P18)随着时间的推移，我的记忆能力发展得如此之快，就像一头大象一样，从来不会忘记告诉我的任何事情！
【句法分析】so...that... 如此??以致??。 that 引导结果状语从句。另外， such...that...也引导结果状语从句。其结构形式为： so＋adj./adv.
＋adj.＋a/an＋可数名词单数 ＋many/few＋可数名词复数
much/little＋不可数名词that 从句 such＋a/an＋adj.＋可数名词单数 ＋adj.＋可数名词复数 ＋adj.＋不可数名词that 从句
拓展：(1)当 so.../such...位于句首时，句子要部分倒装。 So small was the mark that I could hardly see it. 那个标记非常小，我几乎看不见它。
(2)so...that...中的主句和从句的主语是同一个，that 从句也可改为 as to do 形式。 The old lady was so kind that she led me to the hospital. ＝The old lady was so kind as to lead me to the hospital. 这个老太太是那样好心，她把我领到了医院。
(3)so that 连在一起用，可引导结果状语从句，也可引导目的状语从句。so that引导目的状语从句时，从句中常使用 can/could/may/might/will/would/should 等情态动词；引导结果状语从句时，从句中一般不用 can和 may等
词，在 so that前可以有逗号，意思是“因此；所以”。 He hurried up so that he could catch the train.
他匆匆赶路为的是赶上火车。(对比：He hurried up so that he caught the train. 他匆匆赶路，结果赶上了火车。) 【例句研读】
①She was so excited that she couldn't go to sleep. 她兴奋得睡不着觉。
②It was so hot a day that nobody wanted to do anything.
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(＝It was such a hot day that nobody wanted to do anything.)天气如此热，谁也不想干活。
③I made so many mistakes in the composition that the teacher criticized me. 我的作文中出了许多错误，老师批评了我。
【考点聚焦】so...that...“如此??以至于??”，引导结果状语从句 【即时巩固】
(1)______about wild plants that they decided to make a trip to Madagascar for further research.
A．So curious the couple was B．So curious were the couple C．How curious the couple were D．The couple was such curious 【答案】B
(2)Most children need encouragement in time of failure ______ they can cheer up again. A．so that B．in case C．because 【答案】A
【解析】考查 so that 引导目的状语从句。
考点4 by the time 到??为止(引导时间状语从句，如果从句用一般过去时，则主句用过去完成时；如果从句用一般现在时，则主句用将来完成时)”
【教材原句】By the time I was sixteen，my dream had come true.(P20)到我16岁时，我的梦想已经成为现实。
【句法分析】by the time 到??为止(引导时间状语从句，如果从句用一般过去时，则主句用过去完成时；如果从句用一般现在时，则主句用将来完成时) 【例句研读】
By the time they get there，we will have finished the work.他们到那里时，我们已经把工作做完了。
By the time the soldiers arrived at the area，the number of the injured had risen to ten thousand.
D．if
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