比较状语从句ppt课件
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高中英语语法课件_状语从句 (共42张PPT)
whether…or…
whether…or…引导的让步状语从句： △ 这种从句也称“选择条件-让步状语从句”，可位于 主句之前或之后，如： 1.Whether you like it or not, you’ll have to do it. 2. We hold that all countries, (whether they are) big or small, (whether they are) rich or poor, should be equal. 3. Whether it rains or snows, I will go tonight. 5. She had to go, whether or not she wanted it.
2) 一些表示时间的名词词组也可引
导时间状语从句。如：the moment, the minute, （一…就）next time （下次）, every/each time （每 次）。 e.g. The moment he comes, I will tell him.
4) as soon as, immediately, directly, instantly 等副词也可引 导状语从句。表示“一…… 就……”。
.
1. I was so familiar with him that I recognized his voice ______ I picked up the phone. A. while B. after C. In case D. the minute 2. How long do you think it will take _______ our product becomes popular with the consumers? A. when B. until C. before D. since
初中英语状语从句课件(共68张ppt)
They had not been married four months before they were divorced. 他们结婚还不到四个 月就离婚了。
After you think it over, please let me know what you decide.你仔细考虑过以后，告诉我你是 怎样决定的。
外星人买纪念品时，那女孩给警察打了电话。(表示主句，从句
的动作同时发生，while后引导的状语从句的动词必须是延续动词不能
是点动词，因为它表示较长时间)
mother was worried because little alice was ill, especially as (when/ while) father was away.
我到那里时，正在下大雨。 ( 动作同时发生，when
可换为as, 但不能换为while，因为get是点动词.)
When I had read the article, he called me.
我看完这篇文章之后，她给我打了电话。( 从句动作
发生在主句之前，注意时态表达，只能用when )
When I got to the cinema, the film had begun.
when
1、还可以表示从句动词的动作在主几句动词的动作"
之前 "或"之后"发生。
2、when=and then; at that moment (正在那个时候)
while 1、用于时间较长时
2、 强调两个动作同时进行，并表示对比时
有时这三个连词可以互换，有时不可以。
It was raining hard when (as) I got there.
After you think it over, please let me know what you decide.你仔细考虑过以后，告诉我你是 怎样决定的。
外星人买纪念品时，那女孩给警察打了电话。(表示主句，从句
的动作同时发生，while后引导的状语从句的动词必须是延续动词不能
是点动词，因为它表示较长时间)
mother was worried because little alice was ill, especially as (when/ while) father was away.
我到那里时，正在下大雨。 ( 动作同时发生，when
可换为as, 但不能换为while，因为get是点动词.)
When I had read the article, he called me.
我看完这篇文章之后，她给我打了电话。( 从句动作
发生在主句之前，注意时态表达，只能用when )
When I got to the cinema, the film had begun.
when
1、还可以表示从句动词的动作在主几句动词的动作"
之前 "或"之后"发生。
2、when=and then; at that moment (正在那个时候)
while 1、用于时间较长时
2、 强调两个动作同时进行，并表示对比时
有时这三个连词可以互换，有时不可以。
It was raining hard when (as) I got there.
初中状语从句讲解-PPT
We waited until he came.
2．用于否定句时，主句谓语动词是非延续性动 词，从句为肯定，意为“某动作直到某时间才开 始”。如He won’t go to bed till/until she returns.
3．till不可以置于句首，而until可以。如： Until you told me I had no idea of it.
从他离开后我们没见过面。
※ when: 持续性／非持续性动词都可以 当…时
Are you going to be a sailor when you leave school?
while /when辨析
❖ when/while+doing ❖ When/while reading,he fell asleep. ❖ when+终止性、延续性动词 ❖ while+延续性动词 ❖ When the teacher came in,I was sleeping. ❖ =While /When I was sleeping, the teacher came in. ❖ when (就在这时) ❖ I was sleeping, when someone knocked at the door.
❖ He spoke slowly in order that everyone should understand.
他讲得很慢以便人人能听懂。
1. They set out early _s_o_th_a_t_(_in_o_r_d_e_r _th_a_t_) they might arrive there in time.
While I really don’t like art, I find his work impressive. (while=__a_lt_h_o_u_g_h___)
2．用于否定句时，主句谓语动词是非延续性动 词，从句为肯定，意为“某动作直到某时间才开 始”。如He won’t go to bed till/until she returns.
3．till不可以置于句首，而until可以。如： Until you told me I had no idea of it.
从他离开后我们没见过面。
※ when: 持续性／非持续性动词都可以 当…时
Are you going to be a sailor when you leave school?
while /when辨析
❖ when/while+doing ❖ When/while reading,he fell asleep. ❖ when+终止性、延续性动词 ❖ while+延续性动词 ❖ When the teacher came in,I was sleeping. ❖ =While /When I was sleeping, the teacher came in. ❖ when (就在这时) ❖ I was sleeping, when someone knocked at the door.
❖ He spoke slowly in order that everyone should understand.
他讲得很慢以便人人能听懂。
1. They set out early _s_o_th_a_t_(_in_o_r_d_e_r _th_a_t_) they might arrive there in time.
While I really don’t like art, I find his work impressive. (while=__a_lt_h_o_u_g_h___)
状语从句PPT课件(精讲)
连接词类别
作用 as 表示“当„„的时候”，往往和 when/ while 通用，但它着重强调主句与从句的动作或事情同 时或几乎同时发生。
例句 1.She came up as I was cooking.（同时） 2.The runners started as the gun went off.（几 乎同时） 1.When we were at school, we went to the library every day.（在一段时间内） 2.Sorry，I was out when you called me．（ call为短暂性动词）对不起，你打电话时我 刚好外出了。 3. When I got to the airport，the guests had left．（got to后发生）当我赶到飞机场时， 客人们已经离开了。 1.When ／While ／As we were dancing，a stranger came in．（dance为延续性动词） 。 2.Please don’t talk so loud while others are working.
8、比较状语从句 常用引导词:as(同级比较), than(不同程度的比较) 特殊引导词:the more … the more … ; just as …, so…; A is to B what /as X is to Y; no … more than; not A so much as B 例句 She is as bad-tempered as her mother. The house is three times as big as ours. The more you exercise, the healthier you will be. Food is to men what oil is to machine. 食物之于人,犹如油之于机器。
专升本英语-状语从句ppt课件
时间状语从句
till, until 和 not…until… 的用法 1. until/till引导时间状语从句用于 肯定句时，
主句的动词是延续性动词 ，表示动作或状态 一直持续到 until/till所表示的时间，意为“ 某动作一直延续到某时间点才停止 ”。 We waited till/until he came. 2. 用于否定句时，主句谓语动词是非延续性动 词，从句为肯定，意为“ 某动作直到某时间
时间状语从句
3. __C____ the day went on, the weather got
worse. A. With
B. Since D C. As
D. While
4. It will be a long time
Peter
his work.
时间状语从句
5. We were jusCt
时间状语从句
since引导的时间状语从句，常译为“ 自从 ……”， 主句常用现在完成时 ，从句常用一般过去时 。 We haven't seen each other since we parted.
常用句型：It is/It has been + 时间段 + since从句
“自从……有多长时间了 since she
works, you need to have some
knowledge oBf chemistry.
A. In order to B. So as to C. In
order that D. So that
结果状语从句
结果状语从句
1. so… that… (如此…以至于…)， so 后 面应用形容词或副词, 有时省略so只用 that
高中英语状语从句..(共48张PPT)
suddenly someone patted me on the
shoulder :faronmd tbhehni:n正d在. …的时候,突然… 5. The students sang __a_s____ they went
along. 一边...一边
• 6.Strike __w_h_i_le__ the iron is hot. • 7. _A_s___ a child,he lived in the
• in spite of; despite;regardless of • :prep. + n. • He went out in spite of the fact that he
had a bad cold • He went out in spite of the cold.
目的状语从句 so that, in order that 以便/为了
nothing can change it.
原因状语从句
because, since, as, now that
• Because he was ill,he didn’t go to school.
• He didn’t go to school because of his illness.
:不多久就...
• * after : conj&prep. • After he finished his work,he left there. • He finished his work before he left there. • After finishing his work,he left there.
• 以防:
• in case; for fear (that) • 你最好带上你的伞,以防下雨 • You’d better take your umbrella
状语从句-PPT课件
By the time he was fourteen, he had taught himself
advanced mathematics.
Each time he came, he would call on me.
You must show him in immediately he comes.
saw him.
--- Did you remember to give Mary the money you owed her? --- Yes, I gave it to her ______ I saw her.(’01全国春招）
A. while B. the moment C. suddenly D. once
2) She found her calculator _____ she lost it.(’00上 海）
3、原因状语从句：
通常由连词：because, as, since, now that引导。
注意： ① 在强调句中强调原因状语从句，只能用because引导， 不可用as或 since，如：
1) I do every single bit of housework____ my husband Bob just does the dishes now and then.(’04广西）
2) A. since B. while C. when D. as
2) He was about to tell me the secret____ some one patted him on the shoulder. (’02上海）
*when 可表示“如果”。如：
Don’t be afraid of asking for help_____ it is needed. (’03全国）
状语从句(完整版)PPT课件
结果状语从句
Chapter
表示结果的连词
因此
01
thus, therefore, as a result, consequently
所以
02
so, hence
以致于
03
so...that, such...that
结果状语从句的用法
结果状语从句通常置于主句之后，由 连词引导，表示主句行为所产生的结 果。
because since as for
语气最强，表示直接的原因或理 由，可用于回答 why 提出的问题 、引导表语从句、用于强调句等 。
语气最弱，仅说明一般的因果关 系，而非强调某事作为结果的原 因。
原因状语从句的用法
主句在前，从句在后
这是原因状语从句最常见的用法，即主句在前，从句在后，用逗号隔开。
倒装
有时为了强调或保持句子的平衡，可以将时间状语 从句中的部分成分倒装，如“Only when he arrived did we start the meeting.”（只有当他 到达时，我们才开始会议。）
03
地点状语从句
Chapter
表示地点的连词
01
where：在...地方
02
03
04
wherever：无论在哪里
倒装
有时为了强调或保持句子的平衡，可以将让步状语从句中的表语、状语或谓语放 在句首，构成倒装结构。例如：Tired as he was, he kept on working. 尽管他 很累，但他仍然继续工作。
07
目的状语从句
Chapter
表示目的的连词
为了
以免
表示目的，常用于句首，引导目的状 语从句。
02
Chapter
表示结果的连词
因此
01
thus, therefore, as a result, consequently
所以
02
so, hence
以致于
03
so...that, such...that
结果状语从句的用法
结果状语从句通常置于主句之后，由 连词引导，表示主句行为所产生的结 果。
because since as for
语气最强，表示直接的原因或理 由，可用于回答 why 提出的问题 、引导表语从句、用于强调句等 。
语气最弱，仅说明一般的因果关 系，而非强调某事作为结果的原 因。
原因状语从句的用法
主句在前，从句在后
这是原因状语从句最常见的用法，即主句在前，从句在后，用逗号隔开。
倒装
有时为了强调或保持句子的平衡，可以将时间状语 从句中的部分成分倒装，如“Only when he arrived did we start the meeting.”（只有当他 到达时，我们才开始会议。）
03
地点状语从句
Chapter
表示地点的连词
01
where：在...地方
02
03
04
wherever：无论在哪里
倒装
有时为了强调或保持句子的平衡，可以将让步状语从句中的表语、状语或谓语放 在句首，构成倒装结构。例如：Tired as he was, he kept on working. 尽管他 很累，但他仍然继续工作。
07
目的状语从句
Chapter
表示目的的连词
为了
以免
表示目的，常用于句首，引导目的状 语从句。
02
英语语法从句学习 状语从句(共22张PPT)
1. 时间状语从句
常用引导词: when, as , while, as soon as, before, after, whenever, since , not...until， until/till等
表示主句动作发生的时间。
When he came in, I was listening to music．
状语从句
什么是状语？
定义：在英语中，状语用来修饰动词、形容 词、副词或整个句子
这不就是副词的用法嘛！
副词（adv.) 表示动作特征，用来修饰动、形、副词, 在句子充当状语的成分。
状语一般由副词、介词短语、分词和分词短语、 名词、不定式或相当于副词的词或短语来担当。
He walks slowly.
4.目的状语从句 表示主句动作发生的目的。
常用引导词: so that, to, in order that
He works hard everyday so that he can pass the exam. In order that get to school on time, he gets up early.
slowly “缓慢地” 是个副词修 饰walk 这个动词,在句中充 当状语成分。
She is very poor.
very “非常地” 是个副词修饰 poor 这个形容词,说明穷的程度。
状语从句的分类
作用: 状语从句主要用来修饰主句或主句 的谓语，说明时间、地点、原因、目的、 结果、条件、方向、程度、方式和伴随状 况等。
5. 结果状语从句 表示主句动作发生的结果。
常用引导词:so … that, such … that, so that...
This news is exciting, so that he jumps up. He ran so fast that we couldn't keep up with him.
状语从句PPT课件(精讲)
例句 I didn't realize how special my mother was until I became an adult. While John was watching TV, his wife was cooking. The children ran away from the orchard(果园) the moment they saw the guard. No sooner had I arrived home than it began to rain. Every time I listen to your advice, I get into trouble.
• • • • • • • • • • • • • •
引导时间状语从句的连接词除上述外还有： ① till, not … until …, until, before, since Don’t get off the bus until it has stopped. He waited for his father until (till) it was twelve o’clock. It will be five years before he returns from England. ② hardly / scarcely … when, no sooner … than, as soon as once表示“一……就” As soon as I have finished it , I’ll give you a call. Once you show any fear, he will attack you. We had hardly got / Hardly had we got into the country when it began to rain. No sooner had he arrived / He had no sooner arrived than she started complaining. ③ directly, immediately, the moment, the minute that… 一……就 He made for the door directly he heard the knock. ④ each time, every time, by the time Each time he came to my city, he would call on me.
状语从句(完整版)--ppt课件
because, as, since, now that, for,和considering that, seeing that 这七个连词都用于表示表示原 因, 但在语气上一个比一个弱。
＊尽管／虽然／鉴于／如果／届时／
e.g. He walks when he might take a taxi. 虽然
The Queen will visit the town in May, when she will open the new hospital. 届时
How can you hope for mercy yourself when
4. 表示“随着…..”.常指一个行为是另一个行为的结果，
或一种状态随另一种状态变化。句中的动词多表示状态
的发展变化。As
she
grew
opplt课de件r,
she
became
more
beautiful. 5
while:持续性动词 ／进行时
＊一般或现在情况
e.g. I like listening to music while I am doing my homework.
ppt课件
14
考点:名词短语引导时间状语从句
• 1. When every time I was in trouble, he would come to help me.
• 2. At next time you come, do remember bring your son here.
• 3. For the first time I met the girl. I felt in love with her.
We clean the classroom before we leave school every day. It will not be long before you regret for what you’ve done.
＊尽管／虽然／鉴于／如果／届时／
e.g. He walks when he might take a taxi. 虽然
The Queen will visit the town in May, when she will open the new hospital. 届时
How can you hope for mercy yourself when
4. 表示“随着…..”.常指一个行为是另一个行为的结果，
或一种状态随另一种状态变化。句中的动词多表示状态
的发展变化。As
she
grew
opplt课de件r,
she
became
more
beautiful. 5
while:持续性动词 ／进行时
＊一般或现在情况
e.g. I like listening to music while I am doing my homework.
ppt课件
14
考点:名词短语引导时间状语从句
• 1. When every time I was in trouble, he would come to help me.
• 2. At next time you come, do remember bring your son here.
• 3. For the first time I met the girl. I felt in love with her.
We clean the classroom before we leave school every day. It will not be long before you regret for what you’ve done.
比较状语从句优秀课件
b. 主语 + 谓语 + 形容词 / 副词 比较级 + than + 被比对象
在这种结构中，than是个连词， 引导比较状语从句，如果被比 较的对象为名词或代词，一般 采用省略形式，省去与主句中 相同的部分。
This river is longer than that one. He is younger than she. Lesson One is more interesting than Lesson Two. She studies more diligently 勤奋地than her classmates.
She played the piano much better than could have been expected.
Taking this medicine helps to relieve缓解 his headache, and makes him less illtempered脾气暴躁than before.
有时asere not so many tickets available as were asked for.
You seemed to understand human nature as well as do science.
比较句的肯定形式还有the same as, such… as；否定形式还有not the same as, not such… as。
than引导的从句有时可放句首。
Than he no one could show a friendlier attitude 态度to you.
在一定上下文中，从句还可以 省略。
You ought to come here earlier.
状语从句完整版ppt课件
While I really don’t like art, I find his work impressive. ( while =_a_l_t_h_o_u_g_h_ )
While there is life there is hope. (while = __a_s_l_o_n_g_a_s_ )
引导词可分为两部分．
as while when whenever before after until (till) since as soon as
every time next time the first/…time the moment the minute/… instantly immediately directly (一…就…)
We clean the classroom before we leave school every day. It will not be long before you regret for what you’ve done. 不久你就会为你的所作所为后悔的。
after引导的时间状语从句
◆ after引导的时间状语从句，常译为“在……之后”， 表示主句的动作发生在从句的动作之后。
while:持续性动词 ／进行时
＊一般或现在情况
e.g. I like listening to music while I am doing my homework.
＊将来情况－V一般现在时或现在进行时
e.g.— I’m going to the post office. -- While you are there, can you get some stamps for me?
I had no sooner begun to talk than he rang off. No sooner had I begun to talk than he rang off. 我还未来得及讲话，他就挂断了电话。
While there is life there is hope. (while = __a_s_l_o_n_g_a_s_ )
引导词可分为两部分．
as while when whenever before after until (till) since as soon as
every time next time the first/…time the moment the minute/… instantly immediately directly (一…就…)
We clean the classroom before we leave school every day. It will not be long before you regret for what you’ve done. 不久你就会为你的所作所为后悔的。
after引导的时间状语从句
◆ after引导的时间状语从句，常译为“在……之后”， 表示主句的动作发生在从句的动作之后。
while:持续性动词 ／进行时
＊一般或现在情况
e.g. I like listening to music while I am doing my homework.
＊将来情况－V一般现在时或现在进行时
e.g.— I’m going to the post office. -- While you are there, can you get some stamps for me?
I had no sooner begun to talk than he rang off. No sooner had I begun to talk than he rang off. 我还未来得及讲话，他就挂断了电话。
状语从句(23张PPT)初中英语专项复习课件
时间状语从句的引导词
when while as
when, while, as：当…时
①既可以加持续性动词也可以加终止性动词 ②从句动作与主句动作可同时发生也可先后发生
When he arrived all the guests had left. Mary was having dinner when I saw her.
让步状语从句
though和although的用法 （1） 两词用法基本相同，although更加正式一些 （2） even though结构中的though不可以换为although （3） 两词不可与but连用，但是可以和yet, still连用
Though/although she works very hard, she makes slow progress. Though/although she is young, she has travelled to many countries.
条件状语从句
If the weather is terrible next week, we will put off the meeting. As long as you promise to come, I will wait for you. You will be late unless you hurry up. In case it rains, do not expect me.
3. such + 形容词+不可数名词+ that…
This was such fine music that it was worth listening to it again.
比较状语从句
1.在复合句中起比较状语作用的从句称为比较状语从句
状语从句(29张PPT)初中英语专项复习课件
状语从句
初中英语专项复习
状语从句是指句子的状语由一个从句充当， 用来 修饰主句中的动词、形容词或副词等。状语从句由从 属连词引导， 与主句连接， 放在句末时， 一般不在 前面加逗号。状语从句根据它表达的意思可分为时间 、原因、条件、比较、结果、目的等类型。
一、状语从句的种类
状语从句 的种类
引导词
)
color looks terrible.
He ran as fast as he
as＋原级＋ as… could to the top of
比较状语 比较级＋than＋ the hill.
从句 比较对象
John swims better
than Jim does.
状语从句 的种类
引导词
例句
He spoke so fast that
5. when, while, as意为“当……的时候”。 (1)when表示在某一特定的时间点(段)，主句的动作和
从句的动作同时发生或先后发生。when引导的时间 状语从句的谓语动词既可以是非延续性动词，也可 以是延续性动词。如： When we lived in town, we often went to the theatre. 我们住在城镇里的时候常去剧院看戏。
last night. 昨晚直到12点我回来他才停止工作。
7. as soon as… 意为“一……就……”， 强调主句的动 作紧接着从句的动作。如：
As soon as I arrive in Beijing, I will call you. 我一到达北京就会打电话给你。 8. so… that, such… that意为“如此……以至于……”， 引导结果状语从句。基本规则是：so后面接形容词 或副词， such后接名词。但有几点要特别注意： (1)such是形容词， 它所修饰的名词可以是可数名词， 也可以是不可数名词；名词前面可以带形容词， 也 可以不带。如果其后是单数可数名词， 前面需加不 定冠词a或an。因此， such… that… 的句型结构可 分为以下三种：
初中英语专项复习
状语从句是指句子的状语由一个从句充当， 用来 修饰主句中的动词、形容词或副词等。状语从句由从 属连词引导， 与主句连接， 放在句末时， 一般不在 前面加逗号。状语从句根据它表达的意思可分为时间 、原因、条件、比较、结果、目的等类型。
一、状语从句的种类
状语从句 的种类
引导词
)
color looks terrible.
He ran as fast as he
as＋原级＋ as… could to the top of
比较状语 比较级＋than＋ the hill.
从句 比较对象
John swims better
than Jim does.
状语从句 的种类
引导词
例句
He spoke so fast that
5. when, while, as意为“当……的时候”。 (1)when表示在某一特定的时间点(段)，主句的动作和
从句的动作同时发生或先后发生。when引导的时间 状语从句的谓语动词既可以是非延续性动词，也可 以是延续性动词。如： When we lived in town, we often went to the theatre. 我们住在城镇里的时候常去剧院看戏。
last night. 昨晚直到12点我回来他才停止工作。
7. as soon as… 意为“一……就……”， 强调主句的动 作紧接着从句的动作。如：
As soon as I arrive in Beijing, I will call you. 我一到达北京就会打电话给你。 8. so… that, such… that意为“如此……以至于……”， 引导结果状语从句。基本规则是：so后面接形容词 或副词， such后接名词。但有几点要特别注意： (1)such是形容词， 它所修饰的名词可以是可数名词， 也可以是不可数名词；名词前面可以带形容词， 也 可以不带。如果其后是单数可数名词， 前面需加不 定冠词a或an。因此， such… that… 的句型结构可 分为以下三种：
《比较状语从句》课件
3 答案解析：
1. smaller 2. b
总结和复习提示
比较状语从句是用于对事物进行比较和对比的句型，掌握好其结构、引导词、语序和注意事项，能够更准确地 表达自己的观点和比较两个或多个事物之间的相似性或差异性。
练习题及答案解析
1 1. 请用适当的比较级填空：
My cat is _________ (small) than yours.
2 2. 下列句子中哪个表示了否定的比较：
a) I am taller than him. b) This book is not as interesting as the previous one.
《比较状语从句》PPT课 件
在本课件中，我们将一起探讨比较状语从句的定义、作用以及常见的结构， 同时还会涉及引导词、语序和注意事项、语气和时间判断、练习题及答案解 析，最后进行总结和复习提示。
比较状语从句的定义和作用
比较状语从句用于对事物进行比较和对比，表达出两个或多个事物之间的相 似性或差异性。它在句子中作为状语来修饰或限定动作的方式。
比较状语从句的语序和注意事项
1 主句常用陈述语序
He is taller than his b Nhomakorabeaother.
2 倒装结构用于强调
3 比较对象需一致
Never have I seen such a beautiful sunset as yesterday.
Mary is as clever as her sister.
常见的比较状语从句结构
1 比较级 +than
Mike is taller than his brother.
2 as +adj./adv. +as
1. smaller 2. b
总结和复习提示
比较状语从句是用于对事物进行比较和对比的句型，掌握好其结构、引导词、语序和注意事项，能够更准确地 表达自己的观点和比较两个或多个事物之间的相似性或差异性。
练习题及答案解析
1 1. 请用适当的比较级填空：
My cat is _________ (small) than yours.
2 2. 下列句子中哪个表示了否定的比较：
a) I am taller than him. b) This book is not as interesting as the previous one.
《比较状语从句》PPT课 件
在本课件中，我们将一起探讨比较状语从句的定义、作用以及常见的结构， 同时还会涉及引导词、语序和注意事项、语气和时间判断、练习题及答案解 析，最后进行总结和复习提示。
比较状语从句的定义和作用
比较状语从句用于对事物进行比较和对比，表达出两个或多个事物之间的相 似性或差异性。它在句子中作为状语来修饰或限定动作的方式。
比较状语从句的语序和注意事项
1 主句常用陈述语序
He is taller than his b Nhomakorabeaother.
2 倒装结构用于强调
3 比较对象需一致
Never have I seen such a beautiful sunset as yesterday.
Mary is as clever as her sister.
常见的比较状语从句结构
1 比较级 +than
Mike is taller than his brother.
2 as +adj./adv. +as
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.
b. 主语 + 谓语 + 形容词 / 副词 比较级 + than + 被比对象
.
在这种结构中，than是个连词 ，引导比较状语从句，如果被 比较的对象为名词或代词，一 般采用省略形式，省去与主句 中相同的部分。
.
This river is longer than that one. He is younger than she. Lesson One is more interesting than Lesson Two. She studies more diligently 勤奋地than her classmates.
比较句的肯定形式还有the same as, such… as；否定形式还有not the same as, not such… as。
.
Your name is the same as your father’s. Her dress was the same color as mine. Your watch is not the same as his. I never met such a man as your younger brother.
.
有时as好象是从句的主语，其 实是从句的主语省略了。
.
There were not so many tickets available as were asked for.
You seemed to understand human nature as well as do science.
.
.
有时，连词than后直接跟从句 的谓语，这时我们可以把它看 成是省略了某些词语。
.
在这种结构中，有时比较对象 需要根据上下文内容进行判断； 有时对象含蓄在主句中，这时 后面往往是一个表示时间或条 件的修饰语。
.
There were more casualties 受害者than was reported. (= than it was reported there were)
.
表示两个人或事物在性质、特 征等方面的不相似或不相同时 ， 就用“主语 + 谓语 + not so / as +形容词 / 副词 + (名词) + as + 被比对象”这个句型。
.
You are not so old as you look. There was no garden so lovely as his in this city. It isn’t as cold as it was yesterday. No person is either so happy or so unhappy as he imagines. Finally he has made as much money as he wanted.
.
than引导的从句有时可放句首。 Than he no one could show a friendlier attitude 态度to you.
.பைடு நூலகம்
在一定上下文中，从句还可以 省略。 You ought to come here earlier.
.
c. 主语 + 谓语 + 形容词 / 副词 最高级 +（名词）+ 范围
常是省略形式。
.
Physics is as important as mathematics (is). You seem to know music as well as you know astronomy.天文学 Take as much as you want. Is it as difficult as they say it is? We have accomplished as 达到（目的) much in the past three years as would have taken ten years in the past.
Degrees of Comparison
比较状语从句
.
比较状语从句是表示比较、比 例、类比等的句子。其主要句 子结构如下：
.
a. 主语 + 谓语 + as + 形容词 / 副词 + as + 被比对象
.
这个句型叫等比句结构，表示两 个人和事物在性质、特征等方面 相似或相等，即相等的比较。 被 比对象可能是从句中的主语，也 可能是宾语或其他成分。两个as， 作用不同，前一个as是副词，在主 句中说明所比较内容的程度，后 一个as是连词，含有“比”、“如 同”的意思，它所引导的从句通
She played the piano much better than could have been expected.
.
Taking this medicine helps to relieve缓解 his headache, and makes him less illtempered脾气暴躁than before.
.
在这个句子结构中，形容词最 高级的前面要加定冠词the。副 词最高级的前面可加the可不加 。形容词最高级后面可跟名词 ，而副词后面却不能跟名词， 它只能修饰动词。比较范围一 般是短语或从句。
.
This coat is the most expensive that I’ve ever bought. She is the most active girl in our class. He worked hardest in the workshop. She bought the least expensive towels that she could find.
.
He drives faster and more dangerously than you. This test is less simple than I expected it to be. Light does not travel at the same speed through all materials物质; it goes slower through some than through others.
b. 主语 + 谓语 + 形容词 / 副词 比较级 + than + 被比对象
.
在这种结构中，than是个连词 ，引导比较状语从句，如果被 比较的对象为名词或代词，一 般采用省略形式，省去与主句 中相同的部分。
.
This river is longer than that one. He is younger than she. Lesson One is more interesting than Lesson Two. She studies more diligently 勤奋地than her classmates.
比较句的肯定形式还有the same as, such… as；否定形式还有not the same as, not such… as。
.
Your name is the same as your father’s. Her dress was the same color as mine. Your watch is not the same as his. I never met such a man as your younger brother.
.
有时as好象是从句的主语，其 实是从句的主语省略了。
.
There were not so many tickets available as were asked for.
You seemed to understand human nature as well as do science.
.
.
有时，连词than后直接跟从句 的谓语，这时我们可以把它看 成是省略了某些词语。
.
在这种结构中，有时比较对象 需要根据上下文内容进行判断； 有时对象含蓄在主句中，这时 后面往往是一个表示时间或条 件的修饰语。
.
There were more casualties 受害者than was reported. (= than it was reported there were)
.
表示两个人或事物在性质、特 征等方面的不相似或不相同时 ， 就用“主语 + 谓语 + not so / as +形容词 / 副词 + (名词) + as + 被比对象”这个句型。
.
You are not so old as you look. There was no garden so lovely as his in this city. It isn’t as cold as it was yesterday. No person is either so happy or so unhappy as he imagines. Finally he has made as much money as he wanted.
.
than引导的从句有时可放句首。 Than he no one could show a friendlier attitude 态度to you.
.பைடு நூலகம்
在一定上下文中，从句还可以 省略。 You ought to come here earlier.
.
c. 主语 + 谓语 + 形容词 / 副词 最高级 +（名词）+ 范围
常是省略形式。
.
Physics is as important as mathematics (is). You seem to know music as well as you know astronomy.天文学 Take as much as you want. Is it as difficult as they say it is? We have accomplished as 达到（目的) much in the past three years as would have taken ten years in the past.
Degrees of Comparison
比较状语从句
.
比较状语从句是表示比较、比 例、类比等的句子。其主要句 子结构如下：
.
a. 主语 + 谓语 + as + 形容词 / 副词 + as + 被比对象
.
这个句型叫等比句结构，表示两 个人和事物在性质、特征等方面 相似或相等，即相等的比较。 被 比对象可能是从句中的主语，也 可能是宾语或其他成分。两个as， 作用不同，前一个as是副词，在主 句中说明所比较内容的程度，后 一个as是连词，含有“比”、“如 同”的意思，它所引导的从句通
She played the piano much better than could have been expected.
.
Taking this medicine helps to relieve缓解 his headache, and makes him less illtempered脾气暴躁than before.
.
在这个句子结构中，形容词最 高级的前面要加定冠词the。副 词最高级的前面可加the可不加 。形容词最高级后面可跟名词 ，而副词后面却不能跟名词， 它只能修饰动词。比较范围一 般是短语或从句。
.
This coat is the most expensive that I’ve ever bought. She is the most active girl in our class. He worked hardest in the workshop. She bought the least expensive towels that she could find.
.
He drives faster and more dangerously than you. This test is less simple than I expected it to be. Light does not travel at the same speed through all materials物质; it goes slower through some than through others.