人教版高三英语专题复习as的用法归纳[全套]人教.ppt

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1、高三英高三英语专题复复习（I）2021/8/9 星期一1as用法归纳asas一词在高中课本中，看起来简单，但用一词在高中课本中，看起来简单，但用法很多，经常出现，而又不易掌握。主要法很多，经常出现，而又不易掌握。主要表现在词性多，词义广，用法灵活。现将表现在词性多，词义广，用法灵活。现将其用法归纳如下：其用法归纳如下：.as 作副词，表示程度，意为作副词，表示程度，意为“同样地同样地”。在。在“asas”,“not asas”结构中的第一个结构中的第一个as是是副词，作副词，作“和和/与与(不不)一样一样”解。解。e.gJack is as tall as his father.He does

2、nt speak English as/so fluently as you.2021/8/9 星期一2.As作连词，主要引导以下状语从句：作连词，主要引导以下状语从句：1.引导时间状语从句引导时间状语从句。与。与while意义相近，强调意义相近，强调两个动作同时发生；或某事一发生，另一事立刻两个动作同时发生；或某事一发生，另一事立刻发生。发生。e.g He shouted aloud as he ran along.I was startled as he opened the door.We get wiser as we get older.2.引导原因状语从句引导原因状语从句，与，与b

3、ecause的用法相近。的用法相近。e.g As it was getting very late,we soon turned back.We must stop writing now,as I have rather a lot of work to do.2021/8/9 星期一33.引导方式状语从句，作引导方式状语从句，作“正如，好象，按照正如，好象，按照”解。主要的句式有解。主要的句式有as if(as though);just as;just asas.e.g When at Rome,do as Romans do.We do farm work as the old peas

4、ant teaches us.When a pencil is partly in a glass of water,it looks as if it were broken.As(it is)in your country,we grow wheat in the north and rice in the south.正如正如(像像)你们国家一样，你们国家一样，。4.引导条件状语从句。主要句式有：引导条件状语从句。主要句式有：as long as/so long as 只要只要 2021/8/9 星期一4 e.g As long as you study hard,you will ma

5、ke great progress.5.引导让步状语从句；作引导让步状语从句；作“虽然，尽管虽然，尽管”解。解。这时从句常用倒状语序，即把从句中的表语这时从句常用倒状语序，即把从句中的表语,状状语或动词原形放在语或动词原形放在as之前。之前。e.g Child as she is,she knows a lot.Though she is a child,she knows a lot.Busy as he is,he insists on studying.Though he is busy,he .Try as he might,Tom could not get out of the d

6、ifficulties.Though he might try,Tom could not get out of the difficulties.2021/8/9 星期一5.As作关系代词作关系代词1.引导限制性定语从句引导限制性定语从句，用在，用在“such as”,“the same as/the same as”等结构中，等结构中，常译作常译作“像像一样的人或物一样的人或物”，“凡是凡是的人或物的人或物”。e.g He wished to be such a man as Lei Feng was.My bike is the same as yours.2.引导非限制性定语从句引导非

7、限制性定语从句，用来指代它前面的，用来指代它前面的整个句子整个句子(即先行句即先行句)，意思是，意思是“这一点这一点”。这个。这个分句可以放在句首，句中，或句末。分句可以放在句首，句中，或句末。e.gThis elephant is like a snake,as anybody can see.2021/8/9 星期一6As is well known,oceans cover more than 70%of the earth.3.若非限制性定语从句位于句首，句中或句末，若非限制性定语从句位于句首，句中或句末，则用则用as来引导。来引导。e.g As we expected,he comp

8、leted his task with great success.The compass was invented in China,as we know now.4.若非限制性定语从句中的谓语动词是若非限制性定语从句中的谓语动词是 be said be known,be expected,be reported,be announced等结构时，不论是在句首，句中，等结构时，不论是在句首，句中，句末，都必须句末，都必须as用来引导用来引导.e.gAs is known to us,Taiwan is a part of China.2021/8/9 星期一7.As作介词作介词1.作作“如，

9、像如，像”解。解。e.g They got united as one man.She spoke of me as her closed friend.2.作作“充当，作为充当，作为”解。解。e.g As a writer,he was famous.English is spoken as the first language be most people in Australia.3.As作为介词，常和以下动词连用。作为介词，常和以下动词连用。regardas/be known as/consideras useas/describeas/be remembered as work as

10、/act as/be honored as/We regard the sun as the source of most forms of energy.e.g2021/8/9 星期一8.含含as的固定词组的固定词组1.as soon as引导时间状语从句。引导时间状语从句。So/as far as I know在句中作插入语。在句中作插入语。意思是意思是“据我所知据我所知”。e.gAs/So far as I know,he will come here next Monday.As well as并列连接词组，意思是：并列连接词组，意思是：“和，和，同同”。当其。当其连接两个并列主语连接

11、两个并列主语时，谓语动词时，谓语动词应与应与前面的主语前面的主语在数上保持一致。也可以和在数上保持一致。也可以和短短 语语not onlybut also进行替换。进行替换。e.g2.My parents as well as my elder sister enjoy music.试比较下面句子。试比较下面句子。My elder sister as well as my parents enjoys music.2021/8/9 星期一9Tom studies Japanese as well as Chinese.Tom studies not only Chinese but also

12、Japanese.as well译为译为“也，还也，还”经常放在句尾。与经常放在句尾。与too,also同义词。同义词。e.g3.Come here early,and bring your brother as well.So as to do sth./soas to do sth.引导引导 目地或结果状语。目地或结果状语。e.g4.He studies hard so as to pass the exam.He was so strong as to carry the heavy box.5.such as意为意为“例如，诸如例如，诸如”可用来引入可用来引入同位语，举一例或数例说明它

13、与之同位词的同位语，举一例或数例说明它与之同位词的词词 所含的具体内容。所含的具体内容。2021/8/9 星期一10e.g There are different forms of energy,such as heat energy,light energy,sound energy and etc.6.as to(=as for/as regards)关于，至于关于，至于 as much as/as many as“多达多达，达到，达到 至多至多”e.gThere is no doubt as to his honesty.He can earn as much as 500 dollar

14、s a day.7.as a result/as a result of(由于由于的结果的结果)as a whole(就整体来说就整体来说)/as follows(如下如下)as usual(照常照常)/as a(general)rule(通常通常)as a matter of fact(事实上事实上)/as above(如上如上)as soon as possible/as early as possible as quickly as possible2021/8/9 星期一11More examples:She died as a result of the accident.The r

15、easons are as above(as follows).The machine runs as usual.As a matter of fact,air is a gas.His father gets up early as a rule.You should improve your English as soon as possible.When sound travels through air,the air,as a whole doesnt move.Today our life has been much better as compared with that before liberation.和和解放前解放前比比起来我们今天的生活好得多了。起来我们今天的生活好得多了。2021/8/9 星期一122021/8/9 星期一13