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高中英语语法-条件状语面面观之一

发布时间:2012-06-19 05:36     浏览次数:

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   前提状语面面观之一   前提状语大抵有如下几种示意法:  1. 用附属连词引诱状语从句,示意前提。  ( 一 ) if 意为“要是”,是最通俗的附属连词之一,示意前提。 if 引诱的从句中可以用述说语气,也可以用假造语气。例如:  If you are tired,we will go straight home.  要是你累了,我们就马上回家吧。  If winter come...

 

  前提状语面面观之一

  前提状语大抵有如下几种示意法:

 1. 用附属连词引诱状语从句,示意前提。

 ( 一 ) if 意为“要是”,是最通俗的附属连词之一,示意前提。 if 引诱的从句中可以用述说语气,也可以用假造语气。例如:

 If you are tired,we will go straight home.

 要是你累了,我们就马上回家吧。

 If winter comes,can spring be far behind?

 (要是)冬季来了,春季还会远吗?

 If Columbus had not discovered America,somebody else would have discovered it.

 要是哥伦布没有发现美洲,他人也会发现的。

 If the sea were to rise 500 feet,India would become an island.

 要是海洋水面上升 500 英尺,印度就将变成一个孤岛了。

 If it should rain tomorrow,the crops would be saved.

 要是来日诰日下雨,庄稼就获救了。

 ( 二 )附属连词 unless 意为“要是不,除非”,含否定意义,相当于 if not .例如:

 We are leaving now unless you want us to wait for you.

 要是你不要咱们等你,那咱们如今就走。

 As we know now, heavy objects and light objects fall at the same speed unless air holds them back.

 如今咱们都晓得,要是没有空气的阻力,重的物体和轻的物体垂直下降的速率是同样的。

 ( 三 )附属连词 once 意为“一旦”,夸大的是前提。 once 引诱的从句可以位于句首,也可以位于句末。例如:

 Once the masses have a common aim, they will work with one heart.

 一旦大众有了配合的目的,他们就会同心工作。

 Once you show any sign of fear, he will attack you.

 你一旦露出任何恐惧的迹象,他就会袭击你。

 China will shake the world once it awakens.

 中国一旦醒悟,它就会振撼整个世界。

 ( 四 ) so long as 和 as long as 是复合连词,作“只要”解,引诱前提状语从句,夸大主句所述的情形和从句所述的情形同时并存。在示意前提时,前者比后者更经常使用。例如:

 We shall overcome the difficulties so long as we follow the Party’s correct policy.

 只要咱们履行党的正确政策,咱们就能克服困难。

 Rice will grow well so long as it is given enough sunlight and a good supply of water and fertilizer.

 只要能获得足量的阳光、水和肥料,水稻就能长得很好。

 Under the leadership of the Communist Party, as long as there are people, every kind of miracle can be performed.

 在共产党的领导下,只要有了人,甚么人世事业都可以缔造出来。

 As long as we have a strong determination to serve the people heart and soul, everywhere we see occasions for doing so.

 只要有1颗全心全意为人民服务的心,随处都有为人民服务的机会。

 ( 五 ) suppose, supposing 或 let’s suppose 都相当于一个附属连词,示意一种假想的情形,意为“假设”。由它们引诱的状语从句多与疑难情势的主句搭配。例如:

 Suppose he is absent, what shall we do?

 假设他不在,咱们怎么办?

 Supposing the plane does not arrive on time, what shall I do?

 假设飞机不能准时达到,我该怎么办呢?

 Let’s suppose that we had not helped him, what would have happened?

 假设咱们没有匡助他,会产生甚么情形呢?

 ( 六 ) on condition that 是复合连词,意为“前提是”,暗含某种特定的前提意义。例如:

 She will join us on condition that you also be there.

 她和咱们一起去,前提是你也将在场。

 He said that he would come to the meeting on condition that no one asked him to speak.

 他说他将出席这个会议,前提是不要让他谈话。

 ( 七 ) in case 相当于附属连词,意为“要是,假设,省得,以防(万一)”,引诱前提状语从句。例如:

 In case it pours, do not expect me.

 要是大雨倾盆,就不要期望我来了。

 In case he arrives before I get back, please ask him to wait.

 要是在我回来之前他来到,请他等我一下。

 Send me a message, in case you have any difficulty.

 万一有甚么难题,请给我捎个信来。

 ( 八 ) if only 意为“希望,如果……就好了”,引诱前提状语从句。如许的前提平日是假造的,用来示意语言人对某事物寄与的猛烈欲望。如许的从句平日没有响应的主句与之搭配。例如:

 If only he were alive! 如果他活着该多好呀!

 If only Tome knew about it!

 希望汤姆晓得那件事!

 If only I had arrived on time!

 我当时如果能按时达到就好了!

 2. 介词短语或复合介词短语平日也可以作状语,示意可能实现的前提。

 可以如许用的介词或复合介词平日有:with , without , in case of , in the event of , but for 等。这时候句子的谓语动词中平日含有 can , will , could , would 等情态动词。例如:

 With such knowledge and experience, he is sure to succeed.

 有了如许的知识和经验,他一定会胜利。

 With nothing taken home, the man hesitated to explain the matter to his wife.

 要是没有器材带回家,对老婆是否是解释这件事,那个人拿不定主张。

 Without water, nothing could live.

 没有水,甚么也活不了。

 Without the leadership of the Communist Party of China, there would be no new China.

 没有中国共产党,就没有新中国。

 In case of my absence, who will take my place?

 万一我不能来,谁来顶替我呢?

 In case of any difficulty, you must consult with the masses.

 要是碰着难题,你应该和大众商酌。

 In the event of her going to Shanghai, her children will be put under my care.

 假设她到上海去,她的孩子将交给我照看。

 But for his uncle’s help, Jack would not have finished his college education in time.

 要没有他叔叔的匡助,杰克是不会实时完成大学学业的。

 3. 用分词结构作状语,示意可能实现的前提。例如:

 Combining two atoms of hydrogen with one of oxygen, you will get a molecule of water.

 要是两个氢原子与一个氧原子结合,就可以获得一个水分子。

 Given (= If we were given ) more time, we could do it better.

 要是多给咱们一些时候,咱们就能把这件事做得更好。

 Given the lengths of the two sides of a right-angled triangle, we can find out the length of a third side.

 如果晓得直角三角形两个边的长度,咱们就能求出第三边的长度。

 Compared with China, the United States is a young country.

 

 

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