《As用法总结》课件
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《AS的用法总结》课件
继承与多态
继承和多态是一些面向对象 编程语言中的基本概念，AS 也不例外。
接口
接口定义了对象可以执行的 操作以及其他对象应该如何 调用这些操作。
AS实践应用
常用API
AS Games Framework等各种AS API为Flash开发者提供了丰富多 样的特效与工具。
Flash开发
移动应用开发
AS可于创作各种Flash互动应用， 无论是动画展示、游戏，甚至整 个网站都可以有。
AS进阶知识
1
函数定义与调用
编写函数并调用它们是使用AS的基本技
条件语句
2
能之一。
AS的条件语句可执行不同的操作，具体
取决于特定条件是否满足。
3
循环语句
AS的循环语句可重复执行一组代码，直 到指定条件返回false。
AS高级知识
类与对象
AS是一种面向对象编程语言， 因此类和对象是AS编程的核 心。
AS的用法总结
本PPT课件旨在介绍AS的历史、特点及其基础知识与进阶知识，解析AS的高 级特性和实践应用，使您更加深入了解AS。
AS的概念
AS是什么？
AS是Adobe Systems公司开 发的一种面向对象编程语言。
AS的历史
AS最初是在Flash 4中引入， 目的是使Flash开发人员能够 编写及动画。
AS的优势
AS语言是强大且灵活的。它 可以编写动态、交互式和复 杂的应用程序。
AS基础知识
AS语言基础
学习AS语言的基础知识对于开发 者学习更高级的技巧和概念是至 关重要的。
AS的数据类型
AS的运算符
AS数据类型具有强大的类型推断 能力，可以使用与编码有关的表 达式在运行时自动确定数据类型。
定语从句之as的用法课件
详细描述
在这种用法下，as作为关系代词，引导定语从句修饰主句中的名词或代词，表 示两个对象具有相似之处。通常情况下，as在从句中作主语或宾语。例如：She has a dog as her pet.（她有一只狗作为宠物。）
as表示“作为”
总结词
as在定语从句中表示“作为”，引导定语从句描述和主句中的名词或代词具有特 定身份或角色关系的对象。
As可以引导限制性定语从句和非 限制性定语从句，而when、
whereas只用于引导状语从句。
As在从句中作主语、宾语、表语 等成分，而when、whereas不
作任何成分。
05
as引导的定语从句的练习及解 析
单句填空练习
总结词
辨别句子结构，确定需要填写的引导词
详细描述
给出多个单句，每个句子中留有一个空格，需要选择合适的引导词填入。例如，“The student ________ always talks in class is John.” 正确答案应该是“who”，因为“who”可以引导定语从句， 并作为定语从句的主语。
详细描述
在这种用法下，as作为关系代词，引导定语从句修饰主句中的名词或代词，表示该对象之所以具有某种属性或特 征是因为从句中描述的原因。例如：He was late for school as his car broke down.（他上学迟到是因为他的 车坏了。）
as表示“正如”
总结词
as在定语从句中表示“正如”，引导定语从句对主句中的名 词或代词进行比较或对照。
详细描述
在这种用法下，as作为关系代词，引导定语从句修饰主句中的名词或代词，表示 该对象在特定情境下具有某种身份或角色。例如：She works as a teacher in a primary school.（她在一所小学担任教师工作。）
在这种用法下，as作为关系代词，引导定语从句修饰主句中的名词或代词，表 示两个对象具有相似之处。通常情况下，as在从句中作主语或宾语。例如：She has a dog as her pet.（她有一只狗作为宠物。）
as表示“作为”
总结词
as在定语从句中表示“作为”，引导定语从句描述和主句中的名词或代词具有特 定身份或角色关系的对象。
As可以引导限制性定语从句和非 限制性定语从句，而when、
whereas只用于引导状语从句。
As在从句中作主语、宾语、表语 等成分，而when、whereas不
作任何成分。
05
as引导的定语从句的练习及解 析
单句填空练习
总结词
辨别句子结构，确定需要填写的引导词
详细描述
给出多个单句，每个句子中留有一个空格，需要选择合适的引导词填入。例如，“The student ________ always talks in class is John.” 正确答案应该是“who”，因为“who”可以引导定语从句， 并作为定语从句的主语。
详细描述
在这种用法下，as作为关系代词，引导定语从句修饰主句中的名词或代词，表示该对象之所以具有某种属性或特 征是因为从句中描述的原因。例如：He was late for school as his car broke down.（他上学迟到是因为他的 车坏了。）
as表示“正如”
总结词
as在定语从句中表示“正如”，引导定语从句对主句中的名 词或代词进行比较或对照。
详细描述
在这种用法下，as作为关系代词，引导定语从句修饰主句中的名词或代词，表示 该对象在特定情境下具有某种身份或角色。例如：She works as a teacher in a primary school.（她在一所小学担任教师工作。）
定语从句as的用法课件
定语从句as的用法课件定语从句as的用法课件(一)、 as作连词的用法:as作连词，常用来连接主句和状语从句。
1.引导时间状语从句，作“当...的时候”解，有“随着...”之意，与while意义相近，强调两个动作同时发生;或某事一发生，另一事立即发生。
eg：He shouted aloud as her ran along.他一边往前跑，一边高声地呼喊。
I was startled as he opened the door.他一开门，我吓了一跳。
as作连词，相当于when。
eg;As a little boy (When he was a little boy)he began to learn to play piano.他小时候就开始学弹钢琴。
2.引导原因状语从句，作“因为，由于”解，与because的用法相近。
eg;I must stop writing now，as I have rather a lot of work to do.我必须停笔了，因为我还有许多工作要做。
3.引导方式状语从句或比较状语从句，作“正如，(如)像”解。
例eg：As in your country，we grow wheat in the north and rice in the south.正如(像)你们国家一样，我们在北方种小麦，在南方种大米。
(方式状语从句)When at Rome，do as Romans do.入乡随俗。
(方式状语从句)4.引导让步状语从句，作“虽然，尽管”解。
这时从句常用倒装语序，即把从句中的表语、状语或动词原形放在as之前。
eg;Strange as it may seem，it is true.尽管这事看上去很奇怪，但却是真的。
Try as he might，T om could not get out of the difficulties.不管怎样努力，汤姆还是摆脱不了困境。
Asas的用法PPT教学课件
those
that
注：those用于代替前面提到的可数名词复数，以避免重复，that则代替单数可数名词和不可数名词。
that
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当as...as与表示重量、数量、时间、距离、价 格等的计量名词连用时.往往并不表示比较。而 是构成一个形容词组.意为“重达·……多 达·……高达··…等
• The river is as deep as 10 menters. • 这条河深达10米。 • The playground is as long as 200 meters. • 这个球场长达200米。 • This stone is as heavy as 10 tons. • 这块石头重达10吨。
• A: thank you all the same, bye!
• B: bye!
• I’m broke. 我身无分文。
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(1).表示两者在某方面程度相同时，用as+adj/adv原 级+as +比较对象 和…一样
• This book is as interesting as that one. • 这本书和那本书一样有趣。 • She sings as well as Han Meimei. • 她唱得和韩梅梅一样好。
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• 他和他弟弟一样高. • He is as tall as his brother. • 他不如他弟弟高. • He isn’t as tall as his brother. • He is shor ter than his brother.
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• Mary 说日语和Helen一样好。 • Mary speaks Japanese as well as Helen. • Mary 说日语没有Helen好。 • Mary doesn’t speak Japanese so well as Helen. • Mary speaks Japanese worse than Helen.
that
注：those用于代替前面提到的可数名词复数，以避免重复，that则代替单数可数名词和不可数名词。
that
第13页/共15页
当as...as与表示重量、数量、时间、距离、价 格等的计量名词连用时.往往并不表示比较。而 是构成一个形容词组.意为“重达·……多 达·……高达··…等
• The river is as deep as 10 menters. • 这条河深达10米。 • The playground is as long as 200 meters. • 这个球场长达200米。 • This stone is as heavy as 10 tons. • 这块石头重达10吨。
• A: thank you all the same, bye!
• B: bye!
• I’m broke. 我身无分文。
第1页/共15页
(1).表示两者在某方面程度相同时，用as+adj/adv原 级+as +比较对象 和…一样
• This book is as interesting as that one. • 这本书和那本书一样有趣。 • She sings as well as Han Meimei. • 她唱得和韩梅梅一样好。
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• 他和他弟弟一样高. • He is as tall as his brother. • 他不如他弟弟高. • He isn’t as tall as his brother. • He is shor ter than his brother.
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• Mary 说日语和Helen一样好。 • Mary speaks Japanese as well as Helen. • Mary 说日语没有Helen好。 • Mary doesn’t speak Japanese so well as Helen. • Mary speaks Japanese worse than Helen.
As 的基本用法PPT课件
7. Since you refused to see him, he left with brok
8. heart.
9. c). 所说的理由是一种补充说明，用for, 10.从句放于句末
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3) 引导让步状语从句= though/ although 虽然 用于倒装句，将名词、adj、adv提前
3. We didn’t go as far as the others.
4. b). 就…的限度， 在…的范围内
5. He will help you as far as he can./ as far as
6. possible.
7. As far as I know, he will be away for 3 months
You shall never enter the house as long as
I live in it.
8) as much as 多达….
You can have the milk as much as you can.
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9) as far as
1. a) 远到…
2. He walked as far as the post office.
这种结构表示非常强烈的对照。
4) 引导as I do.
Leave it as it is. 保持原状
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3. prep 作为（某种身份）,说明某人，某物的 职业、用途
Why is he dressed as a woman?
He was respected both as a judge and as a man. 4. 固定词组 1）such as （ 列举） 2）as if, as though 似乎（引导表示状态的 句子，虚拟语气）
as引导状语PPT课件
She works as a doctor. (状语)
They have me as one of their own children.(引起宾语 补足语)
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五、含as的固定词组的用法
• 1．as soon as作“一…就”解，引导时间状语从句。eg：
As soon as I get to Beijing，I‘ll write to you．
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• 2．as／so long as作“只要”解，eg；
As／So long as you study hard，you‘ll make progress．
• 3．as if／though常用来引导方式状语从句，作“好像，
仿佛”解。如果从句中讲的是非真实情况，则用虚拟语气。 eg： She loves the child as if／though he were her own．
There is no doubt as to his honesty．
• 5．as much／many as作“多达．．．”，
“达到．．．之多”解。eg： He can earn as much as 5000 dollars a month．
• 6．so／as far as I know作“就我所知”解，
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• 三、as 作副词
表示程度，意为“同样地” 用于as...as...或not so/ as...as...中,前一 个as是副词,后一个as是连词,引导比较状语 从句。
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• 四、 as作介词的用法:
as引导的介词短语大多用作状语,as译为"作为";少 数情况可引起宾语补足语。如:
As a league member, i'll take the lead in everything. ( 状语)
They have me as one of their own children.(引起宾语 补足语)
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五、含as的固定词组的用法
• 1．as soon as作“一…就”解，引导时间状语从句。eg：
As soon as I get to Beijing，I‘ll write to you．
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• 2．as／so long as作“只要”解，eg；
As／So long as you study hard，you‘ll make progress．
• 3．as if／though常用来引导方式状语从句，作“好像，
仿佛”解。如果从句中讲的是非真实情况，则用虚拟语气。 eg： She loves the child as if／though he were her own．
There is no doubt as to his honesty．
• 5．as much／many as作“多达．．．”，
“达到．．．之多”解。eg： He can earn as much as 5000 dollars a month．
• 6．so／as far as I know作“就我所知”解，
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• 三、as 作副词
表示程度，意为“同样地” 用于as...as...或not so/ as...as...中,前一 个as是副词,后一个as是连词,引导比较状语 从句。
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• 四、 as作介词的用法:
as引导的介词短语大多用作状语,as译为"作为";少 数情况可引起宾语补足语。如:
As a league member, i'll take the lead in everything. ( 状语)
as用法小结PPT教学课件
• as rich as a Jew
•
…
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2. as用作连词引导时间状语从句
• as与when，while都是引导时间状语从句的从属连词，含义都是"当……的 时候"。但它们有区别：用when时，从句的动作可以与主句的动作同时发生， 也可以先于主句的动作发生；用while时，从句的动作为一过程，主句动作与 从句动作同时进行或在从句动作过程中发生；用as时，主句和从句的动作同 时发生，具有延续的含义。
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D is generally accepted, economical
growth is determined by the smooth development of production. A. What B. that C. it D. As
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C is known to the world, Mark Twain
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• (1)It was snowing when he arrived at the construction site.他到达 工地时，天正在下雪。
• (2)He was watching TV while his mother was cooking.他母亲做饭时 他在看电视。
从句用倒装语序；however引导让步状语从
句时，它的后面可跟形容词或副词，也要用倒
装语序。
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• (1) Although he is quite old, he still jogs ever y day. 他虽然年纪 相当大，仍然每天慢跑。
• (2) Strange as it may seem, nobody was injured in the accident.这次意外虽然显得令人不可思议，却没有人受伤。
as用法总结PPT
as的用法注意事项
避免过度使用as
要点一
适度使用
在句子中不要过度使用as，以免造成语义混乱和语法错误 。
要点二
替代表达
可以使用其他词汇或表达方式替代as，以增加语言的多样 性和准确性。
注意as在不同语境中的词性变化
词性变化
as可以用作介词、连词、关系代词等，需要根据具体语 境判断其词性。
语法功能
注意
as作为连词时，要求从句用一般现在时、一般过去时或现在完成时等时态与主句保持一致。同时，as引 导的原因状语从句和让步状语从句通常位于句首，而时间状语从句则可以在句首或句末。
PART 03
as作为关系代词
引导限制性定语从句
01
as引导限制性定语从句时，通常用于描述人或事物 在特定情境下的身份、特征或状态。
不同词性的as在句子中充当的成分和语法功能也有所不 同，需要注意区分。
区分as的不同含义和用法
表示“作为”
01
as可以表示“作为”的意思，用于引出身份、角色或功能等。
表示“如同”
02
as可以表示“如同、像……一样”的意思，用于进行比喻或类比
。
引导从句
03
as可以引导时间状语从句、原因状语从句、比较状语从句等，
03
as在非限制性定语从句中可以 充当主语、宾语等成分，表示 被修饰词与从句之间的关系。
与其他词连用
as可以与such、same、as等词连用，构成such...as、the same...as、 as...as等结构，用于引导定语从句。
在这些结构中，as仍然充当关系代词，引导定语从句，并在从句中充当相 应成分。
固定搭配与短语
as well as
避免过度使用as
要点一
适度使用
在句子中不要过度使用as，以免造成语义混乱和语法错误 。
要点二
替代表达
可以使用其他词汇或表达方式替代as，以增加语言的多样 性和准确性。
注意as在不同语境中的词性变化
词性变化
as可以用作介词、连词、关系代词等，需要根据具体语 境判断其词性。
语法功能
注意
as作为连词时，要求从句用一般现在时、一般过去时或现在完成时等时态与主句保持一致。同时，as引 导的原因状语从句和让步状语从句通常位于句首，而时间状语从句则可以在句首或句末。
PART 03
as作为关系代词
引导限制性定语从句
01
as引导限制性定语从句时，通常用于描述人或事物 在特定情境下的身份、特征或状态。
不同词性的as在句子中充当的成分和语法功能也有所不 同，需要注意区分。
区分as的不同含义和用法
表示“作为”
01
as可以表示“作为”的意思，用于引出身份、角色或功能等。
表示“如同”
02
as可以表示“如同、像……一样”的意思，用于进行比喻或类比
。
引导从句
03
as可以引导时间状语从句、原因状语从句、比较状语从句等，
03
as在非限制性定语从句中可以 充当主语、宾语等成分，表示 被修饰词与从句之间的关系。
与其他词连用
as可以与such、same、as等词连用，构成such...as、the same...as、 as...as等结构，用于引导定语从句。
在这些结构中，as仍然充当关系代词，引导定语从句，并在从句中充当相 应成分。
固定搭配与短语
as well as
as的用法归纳PPT幻灯片
有时译作“既然”。 ❖ for 表附加的解释、说明或推理。不放句首
❖ I do it because I like it. ❖ He didn’t go to school because he was ill. ❖ Since many of the customers work during the day, Billy
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1.引导时间状语从句
区别 连词
时间
与主句谓语动 作
whe n
点、段
先于、同时发生
只用as
while 段、过程
过程中、同时发 生
as
当…的 时候
同时进行
① 同一个人的两种动作交替进行, “一边…,一边…”。
② 两个同步发展的动作或为,
“随着”
③ 表示两个短促行为或事 John was having his dinner when I saw him.
in. 我们正在读书的时候，老师走了进来。 ❖ The girl dances as she sings on the stage5.
❖ He looked behind from time to time as he went forward.
❖ 当他朝前走时，不时地向后看。 ❖ As time went on / by, she became more a
ave a loud cry. ❖ 恰巧在飞虫撞到她脸上时，她大哭起来。 6
2. 引导原因状语从句
❖ because 语气最强, 用于回答why 提出的或人们不知道的问题； ❖ as，一般放句首，语气弱，口语化，说明比较明显的原因； ❖ since书面语中，表对方已知的、或稍加分析便可得知的原因，
as用法归纳
1
❖ I do it because I like it. ❖ He didn’t go to school because he was ill. ❖ Since many of the customers work during the day, Billy
3
1.引导时间状语从句
区别 连词
时间
与主句谓语动 作
whe n
点、段
先于、同时发生
只用as
while 段、过程
过程中、同时发 生
as
当…的 时候
同时进行
① 同一个人的两种动作交替进行, “一边…,一边…”。
② 两个同步发展的动作或为,
“随着”
③ 表示两个短促行为或事 John was having his dinner when I saw him.
in. 我们正在读书的时候，老师走了进来。 ❖ The girl dances as she sings on the stage5.
❖ He looked behind from time to time as he went forward.
❖ 当他朝前走时，不时地向后看。 ❖ As time went on / by, she became more a
ave a loud cry. ❖ 恰巧在飞虫撞到她脸上时，她大哭起来。 6
2. 引导原因状语从句
❖ because 语气最强, 用于回答why 提出的或人们不知道的问题； ❖ as，一般放句首，语气弱，口语化，说明比较明显的原因； ❖ since书面语中，表对方已知的、或稍加分析便可得知的原因，
as用法归纳
1
AS的用法总结ppt课件
whole(就整体来说)/as follows(如下 ) as usual (照 常)/as a (general) rule(通常) as a matter of fact(事实上)/as above(如上) as soon as possible/as early as possible as quickly as possible
soon as possible.
⑦ When sound travels through air, the
air, as a whole doesn’t move.
12
My parents as well as my
music. 试比较下面句子。
elder
sister
enjoy
My elder sister as well as my parents enjoys
music. 9
②→ Tom studies Japanese as well as Chinese.
① When at Rome, do as Romans do.
② We do farm work as the old peasant
teaches us. ③ When a pencil is partly in a glass of
water, it looks as if it were broken. ★ ④ As(it is)in your country, we grow wheat
Tom studies not only Chinese but also
Japanese. ★★
3. as well→译为“也，还”经常放在句尾。与too,
also同义词。(may/might as well)e.g
soon as possible.
⑦ When sound travels through air, the
air, as a whole doesn’t move.
12
My parents as well as my
music. 试比较下面句子。
elder
sister
enjoy
My elder sister as well as my parents enjoys
music. 9
②→ Tom studies Japanese as well as Chinese.
① When at Rome, do as Romans do.
② We do farm work as the old peasant
teaches us. ③ When a pencil is partly in a glass of
water, it looks as if it were broken. ★ ④ As(it is)in your country, we grow wheat
Tom studies not only Chinese but also
Japanese. ★★
3. as well→译为“也，还”经常放在句尾。与too,
also同义词。(may/might as well)e.g
《as用法小结》课件
as在句中的用法
总结词
表示方式或程度
详细描述
as在句子中间时，通常用于表示方式或程度。例如，“He runs as fast as possible.”这句话表示他尽可能快地跑。
as在句末的用法
总结词
表示结果或转折
详细描述
as在句末时，通常用于表示结果或转折。例如，“I tried to call him, but he didn't answer as I expected.”这 句话表示结果与预期相反，即他没有接电话。
04as在实际应用中的Fra bibliotek子as在英语阅读中的应用
增强理解
在英语阅读中，as可以用来表示时间、方式、比较等关系，帮助读者更好地理解 句子结构和意思。例如，“As time went on, she became more confident.” 这句话中，as表示时间关系，说明随着时间的推移，她的信心增加了。
as在英语口语中的应用
流畅交流
在英语口语中，as可以用来表示时间、方式、比较等关系， 使语言表达更加流畅和自然。例如，“As you can see, the situation is very serious.”这句话中，as用来引导时间状语 从句，使语言表达更加流畅。
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03
用于比较句型中，表示 “像……一样”。
04
例如：He runs as fast as his friend（他跑得 和他的朋友一样快）。
as作为连词的用法
连接时间状语从句，表示“当……的 时候”。
连接原因状语从句，表示“因为”。
例如：As the clock struck twelve （当钟敲响十二点的时候）。
【正式版】as的用法总结PPT资料
A. With B. Since C. While D. As
2. Mother was worried because little Alice was ill, especially__A__ Father was away in France.
A. as B. that C. during D. if
as引导方式状语从句
Difficult as it is, we should not give it up.
Child as he is, he knows something about electricity.
practice
1. _D___the day went on, the weather got worse.
as的用法总结
高三专题复习
As用法总结(一)
教学目标
全面掌握as的用法 有关as的高考考点
as是英语考试中用得比较多的一个词， 也是很多学生反映较难掌握的一个词。 as的词性较多，词义广，用法灵活。 现将用法归纳如下：
一、as作为从属连词，可以引导下列 从句：
1、as引导时间状语从句，意为“正 当……的Байду номын сангаас候”、“一面……一面……”、 “随着……”，从句可放主句之前或主句 之后。
3. We’d better hurry _C____ it is getting dark. A. and B. but C. as D. unless 4. _C____ , he doesn’t study well. A. As he is clever B. He is as clever C. Clever as he is D. As clever he is
• We must do _as___ the Party tells us (to do).
2. Mother was worried because little Alice was ill, especially__A__ Father was away in France.
A. as B. that C. during D. if
as引导方式状语从句
Difficult as it is, we should not give it up.
Child as he is, he knows something about electricity.
practice
1. _D___the day went on, the weather got worse.
as的用法总结
高三专题复习
As用法总结(一)
教学目标
全面掌握as的用法 有关as的高考考点
as是英语考试中用得比较多的一个词， 也是很多学生反映较难掌握的一个词。 as的词性较多，词义广，用法灵活。 现将用法归纳如下：
一、as作为从属连词，可以引导下列 从句：
1、as引导时间状语从句，意为“正 当……的Байду номын сангаас候”、“一面……一面……”、 “随着……”，从句可放主句之前或主句 之后。
3. We’d better hurry _C____ it is getting dark. A. and B. but C. as D. unless 4. _C____ , he doesn’t study well. A. As he is clever B. He is as clever C. Clever as he is D. As clever he is
• We must do _as___ the Party tells us (to do).
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《As用法总结》
3. 引导方式状语从句，作“正如，好象，按照”解。主要的句式有as if(as though);just as;just as…as . e.g
① When at Rome, do as Romans do.
② We do farm work as the old
peasant teaches us.
difficulties.
→ Though he might try, Tom could not
get out of the difficulties.
《As用法总结》
Ⅲ. As作关系代词
1. 引导限制性定语从句，用在“such… as”, “the same …as/the same as”等结 构中，常译作“像……一样的人或物”，“凡是……的人或物”。e.g
② 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 be said be known,be expected, be reported , be announced等结构时，不论是在句首，句中， 句末，都必须as用 来引导. e.g
As is known to us, Taiwan is a part of China.
《As用法总结》
Ⅳ. As作介词
1. 作 “如，像”解。e.g
① They got united as one man. closed friend.
② She spoke of me as her
2. 作“充当，作为”解。e.g
① He wished to be such a man as Lei Feng was.
② My bike is the same as yours. 2. 引导非限制性定语从句，用来指代它前面的整个句子(即先行句)，意思是“这一 点”。这个分句可以放在句首，句中，或句末。e.g
③ This elephant is like a snake, as anybody can see.
as用法归纳
as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 表现在词性多，词义广，用法灵活。现将 其用法归纳如下：
Ⅰ. as 作副词，表示程度，意为“同样地”。在“as…as”, “not as…as”结构中的
第一个as是副词，作“和/与…(不)一样”解。e.g
①Jack is as tall as his father. as/so fluently as you.
你们国家一样，…… 。
4. 引导条件状语从句。主要句式有：
as long as /so long as 只要
《As用法总结》
e.g As long as you study hard, you will make great progress.
5. 引导让步状语从句；作“虽然，尽管”解。这时从句常用倒状语序，即把从句中 的表语,状语或动词原形放在as之前。e.g
e.g We regard the sun as the source of most forms of energy.
《As用法总结》
Ⅴ. 含as的固定词组 1. as soon as→引导时间状语从句。
So/as far as I know→在句中作插
入语。意思是“据我所知”。
e.g As/So far as I know, he will come here next Monday.
wiser as we get older.
2. 引导原因状语从句，与because的用法相近。 e.g ① As it was getting very late, we soon turned back.
② We must stop writing now, as I have rather a lot of work to do.
③ As a writer, he was famous. language be most people in Australia.
④English is spoken as the first
3. As作为介词，常和以下动词连用。 regard…as/be known as/consider…as use…as/ describe…as/be remembered as work as/ act as/be honored as/
《As用法总结》
④ As 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， 则用as来引导。e.g
① As we expected, he completed his task with great success.
②He doesn’t speak English
《As用法总结》
Ⅱ. As作连词，主要引导以下状语从句：
1. 引导时间状语从句。与while意义相近，强调两个动作同时发生；或某事一发生，
另一事立刻发生。e.g
① He shouted aloud
as he ran along.
② I was startled as he opened the door. ③ We get
③ When a pencil is
partly in a glass of water, it looks as if it were broken. ★
④ As(it
is)in your country, we grow wheat in the north and rice in the south. 正如(像)
① Child as she is, she knows a lot. ★
→ Though she is a child, she
knows a lot. ② Busy as he is, he insists on studying. → Though he is busy,
he … .
③ Try as he might, Tom could not get out of the
3. 引导方式状语从句，作“正如，好象，按照”解。主要的句式有as if(as though);just as;just as…as . e.g
① When at Rome, do as Romans do.
② We do farm work as the old
peasant teaches us.
difficulties.
→ Though he might try, Tom could not
get out of the difficulties.
《As用法总结》
Ⅲ. As作关系代词
1. 引导限制性定语从句，用在“such… as”, “the same …as/the same as”等结 构中，常译作“像……一样的人或物”，“凡是……的人或物”。e.g
② 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 be said be known,be expected, be reported , be announced等结构时，不论是在句首，句中， 句末，都必须as用 来引导. e.g
As is known to us, Taiwan is a part of China.
《As用法总结》
Ⅳ. As作介词
1. 作 “如，像”解。e.g
① They got united as one man. closed friend.
② She spoke of me as her
2. 作“充当，作为”解。e.g
① He wished to be such a man as Lei Feng was.
② My bike is the same as yours. 2. 引导非限制性定语从句，用来指代它前面的整个句子(即先行句)，意思是“这一 点”。这个分句可以放在句首，句中，或句末。e.g
③ This elephant is like a snake, as anybody can see.
as用法归纳
as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 表现在词性多，词义广，用法灵活。现将 其用法归纳如下：
Ⅰ. as 作副词，表示程度，意为“同样地”。在“as…as”, “not as…as”结构中的
第一个as是副词，作“和/与…(不)一样”解。e.g
①Jack is as tall as his father. as/so fluently as you.
你们国家一样，…… 。
4. 引导条件状语从句。主要句式有：
as long as /so long as 只要
《As用法总结》
e.g As long as you study hard, you will make great progress.
5. 引导让步状语从句；作“虽然，尽管”解。这时从句常用倒状语序，即把从句中 的表语,状语或动词原形放在as之前。e.g
e.g We regard the sun as the source of most forms of energy.
《As用法总结》
Ⅴ. 含as的固定词组 1. as soon as→引导时间状语从句。
So/as far as I know→在句中作插
入语。意思是“据我所知”。
e.g As/So far as I know, he will come here next Monday.
wiser as we get older.
2. 引导原因状语从句，与because的用法相近。 e.g ① As it was getting very late, we soon turned back.
② We must stop writing now, as I have rather a lot of work to do.
③ As a writer, he was famous. language be most people in Australia.
④English is spoken as the first
3. As作为介词，常和以下动词连用。 regard…as/be known as/consider…as use…as/ describe…as/be remembered as work as/ act as/be honored as/
《As用法总结》
④ As 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， 则用as来引导。e.g
① As we expected, he completed his task with great success.
②He doesn’t speak English
《As用法总结》
Ⅱ. As作连词，主要引导以下状语从句：
1. 引导时间状语从句。与while意义相近，强调两个动作同时发生；或某事一发生，
另一事立刻发生。e.g
① He shouted aloud
as he ran along.
② I was startled as he opened the door. ③ We get
③ When a pencil is
partly in a glass of water, it looks as if it were broken. ★
④ As(it
is)in your country, we grow wheat in the north and rice in the south. 正如(像)
① Child as she is, she knows a lot. ★
→ Though she is a child, she
knows a lot. ② Busy as he is, he insists on studying. → Though he is busy,
he … .
③ Try as he might, Tom could not get out of the