1、状语从句重难点讲解本模块中我们复习了时间状语从句、条件状语从句和让步状语从句。下面我们来看看这三种从句中需要注意的几点。时间状语从句 1. before / since“It be + 一段时间 + before .”结构，在肯定句中常译为“多久之后才”；在否定句中常译为“不久之后就”。如：It will be three years before he graduates from university.It was not long before he found another job.“It is / has been + 一段时间 + since .”结构中, since从句的谓语动
2、词多用一般过去时，表示动作或状态的完成，计时的起点是动作或状态完成的那一时刻。在语义上，从句动词为延续性动词时，含有否定的意味；从句动词为非延续性动词时，含有肯定的意味。如：It is 3 years since he were here. （表示“他不在这儿已经3年了”）It is 3 years since he stopped smoking. （表示“他不抽烟已经3年了”）2. when / as / while表示“当时”，when引导的从句的动作和主句的动作可以同时发生，也可先后发生，从句中的动词既可以是延续性的，也可以是非延续性的；as，while引导的从句强调主句和从句的动作同
3、时发生，并且从句中的动词通常是延续性的。如：When I lived there, I used to go to the seashore on Sundays.While you were reading the paper, I was working.As the kids walked home, they sang happily.注意：当从句表示“随着”时，连词只能用as。如： As the day went on, the weather got worse.3. till / until两者都表示“一直到；直到才”，基本上可以互换，但till一般不位于句首。当表示主句动作延续
4、到某时才停止时，主句用肯定句；当表示主句动作到某时才开始发生时，主句用否定句。如：Ill wait here until / till the result comes out.(wait这个动作延续到the result comes out停止，主句用肯定句)I wont leave here until / till the result comes out.(leave这个瞬间动作到the result comes out才发生，主句用否定句)条件状语从句1. only if意为“只有，只要”，位于句首时句子用倒装结构。如：Only if you put your heart into
5、your work can you realise your dream.2. 引导条件状语从句的从属连词有：if，unless，so / as long as, in case, on condition that, suppose / supposing, provided that等。让步状语从句 1. as / though / althoughas 引导让步状语从句必须采用倒装结构，常用结构为“形容词、副词、名词（其前不用冠词）、动词 + as + 主语 + 其他”。though比较口语化，为了强调， 从句可以倒装；although 比较正式，多用于句首；两者都不与but连用，但可与
6、still，yet，nevertheless连用。如：Young though / as he is, he runs the company successfully.Though / Although we warned him about the danger of travelling in the forest alone, he went there without telling us.2. “no matter + 疑问词”或“疑问词 + ever”引导让步状语从句，意为“不管；无论”，后面用陈述句语序。 whether . or ., 也可表示让步关系， 意为“不管还是”。如
7、： Whatever (= No matter what) you say, he wont believe you. Ill not have you worry about her whether shes well or ill.总结状语从句种类常用连词例句时间状语从句when, as, while, after, before, till / until, since, once, as soon as, by the time, the moment, hardly . when, the minute, every time, next time, no sooner . than
8、, immediately, ever since等WhileI was inMadridthere was a carnival.The water is fineonceyoure in!Immediatelyshed gone, I remembered her name.No soonerhad we started playing footballthanit started raining.条件状语从句if, unless, so / as long as, only if, on condition that, supposing (that)等I will lend you t
9、he moneyon condition thatyou pay it back in one month.Supposing (that)it were true, what would happen?让步状语从句though, although, as (尽管), while (虽然), however, even though / if, whatever, whether, no matter how / what / which / when / where / who等YoungasI am, I already know what career I want to follow.
10、WhileI am willing to help, I dont have much time available.Keep calm,whateverhappens.I show everything on my face,whetherIm angry or pleased.原因状语从句because, since, as, now that等Sincetheres no more time, we must give it up.Now thatdinner is ready, wash your hands.目的状语从句so that, in case (以防), in order
11、that, for fear that等Bring it nearerso thatI may see it better.Bring a mapin caseyou get lost.方式状语从句(just) as, as if / though等Julie loves the boyas ifshe were his mother.【即学即练】选用括号内合适的内容完成下面短文。Im here today to give you some tips on how to prevent house fires. Ill also be telling you the best way of g
12、etting out of a fire, 1. _ (if / unless) you ever happen to be trapped in one.Most fires in the home happen 2. _ (whenever / while) people are sleeping. One of the most important steps you can take to protect your family is to add a smoke alarm on each floor of your house. 3. _ (Once / Before) youve
13、 got your smoke alarm added and working, you should make an escape plan with your family to make sure everyone knows how to get out. The most common causes of fire in the home are tobacco and smoking products, 4. _ (so / when) its best to avoid smoking in the bedroom. Its also important to keep matc
14、hes and lighters out of reach of children.If a fire does break out and you get trapped in your home by smoke or fire, you should close all doors and stuff towels or clothing under the doors 5. _ (in case / so that) the thick smoke will be kept out. Cover your nose and mouth with a damp cloth to prot
15、ect your lungs. When escaping through a smoky area, youll need to crawl out on all fours, 6. _ (because / although) cleaner air is always nearer the floor. Finally, and very importantly, 7. _ (when / though) a fire breaks out, do not try to rescue pets or possessions 8. _ (as if / even if ) they are
16、 of great value. There isnt time to do this you must get out as soon as possible. Firefighters have a better chance of rescuing people who are trapped than you do.答案1. if 2. while 3. Once4. so 5. so that 6. because7. when 8. even ifI.选用方框内合适的内容完成下面句子（每项限用一次）。in case, since, on condition that, while,
17、 whatever, whether1. _ I was inMadridthere was a carnival.2. I will lend you the money _ you pay it back in one month.3. Keep calm, _ happens.4. I show everything on my face, _ Im angry or pleased.5. _ theres no more time, we must give it up.6. Bring a map _ you get lost.II.选用方框A（每项用两次）和方框B（作为句子结尾）内
18、合适的选项完成下面句子。ABin order thatso as not toseeing thata. it pays poorlyb. some broken tiles (瓷砖) could be repairedc. damage its rootsd. larger planes can land theree. shes so fitf. be overheard1. The swimming pool had to be emptied _ + _.2. People here dont put much effort into the job _ + _.3. You need to lift the plant carefully _ + _.4. The runway is going to extended _ + _.5. Shell probably recover from the illness quickly _ + _.6. We spoke very quietly _ + _.答案I. 1. While 2. on condition that 3. whatever4. whether 5. Since 6. in caseII. 1.+b 2.+a 3.+c4.+d 5.+e 6.+f
