英語名詞性從句課件
【考情分析】
名詞性從句是歷年高考的重點(diǎn)和難點(diǎn)也是熱點(diǎn)。名詞性從句相當(dāng)于名詞，可用作主句的主語、表語、賓語和同位語。因此，名詞性從句分為主語從句、表語從句、賓語從句和同位從句。引導(dǎo)名詞性從句的連接詞有:連接代詞:who, whose, whom, what, which，有詞義，在從句中擔(dān)任成分，如主語、表語、賓語、或定語等;連接副詞:when, where, why, how，有詞義，在從句中擔(dān)任成分，作狀語;連接詞:that, whether, if, as if，if (whether), as if雖有詞義，但在從句中不擔(dān)任成分;that 無詞義，在從句中不擔(dān)任成分，有時(shí)可省略。
今后對(duì)名詞性從句的考查仍將集中在關(guān)聯(lián)詞的選用上，特別石堆what引導(dǎo)的名詞性從句的考查。名詞性從句與其他從句的混合考查將在今后高考中占據(jù)一席之地。易混句型的辨析，比如it作形式主語，主語從句后置的句型與強(qiáng)調(diào)句型的辨析將仍作為高考考查的重點(diǎn)。
【知識(shí)點(diǎn)歸納】
名詞性從句的用法
在句子中起名詞作用的句子叫名詞從句 (Noun Clauses)。 名詞從句的功能相當(dāng)于名詞詞組, 它在復(fù)合句中能擔(dān)任主語、賓語、表語、同位語、介詞賓語等，因此根據(jù)它在句中不同的語法功能，名詞從句又可分別稱為主語從句、賓語從句、表語從句和同位語從句。
一、引導(dǎo)名詞性從句的連接詞
引導(dǎo)名詞性從句的連接詞可分為三類:連詞:that(無任何詞意);whether, if(均表示“是否”表明從句內(nèi)容的不確定性);as if ,as though(均表示“好像”，“似乎”)。
以上在從句中均不充當(dāng)任何成分
連接代詞:what, whatever, who, whoever, whom, whose, which. Whichever, whomever
連接副詞:when, where, how, why
不可省略的連詞:
1. 介詞后的連詞
2. 引導(dǎo)主語從句和同位語從句的連詞不可省略。
That she was chosen made us very happy.
We heard the news that our team had won.
比較:
Whether與if 均為"是否"的意思。 但在下列情況下，whether 不能被if 取代:
1. Whether引導(dǎo)主語從句并在句首;
2. 引導(dǎo)表語從句
3. Whether從句作介詞賓語;
4. 從句后有"or not"
Whether he will come is not clear.
大部分連接詞引導(dǎo)的主語從句都可以置于句末，用 it充當(dāng)形式主語。
It is not important who will go.
It is still unknown which team will win the match.
二、具體分類
1.主語從句
作句子主語的從句叫主語從句。主語從句通常由從屬連詞that，whether，if和連接代詞what，who，which，whatever，whoever以及連接副詞how，when，where，why等詞引導(dǎo)。that在句中無詞義，只起連接作用;連接代詞和連接副詞在句中既保留自己的疑問含義、又起連接作用，在從句中充當(dāng)從句的成分。例如:
What he wants to tell us is not clear. 他要跟我們說什么，還不清楚。
Who will win the match is still unknown. 誰能贏得這場比賽還不得而知。
It is known to us how he became a writer. 我們都知道他是如何成為一名作家的。
Where the English evening will be held has not yet been announced. 英語晚會(huì)將在哪里舉行，還沒有宣布。
【典例1】(2009·上海卷)It is immediately clear ____ the financial crisis will soon be over.
A. since B. what C. when D. whether
【答案】D
【解析】考查主語從句的用法。該句的意思時(shí):經(jīng)濟(jì)危機(jī)是否會(huì)很快結(jié)束是很明顯的事情�！笆欠瘛庇脀hether表示，不能選when是因?yàn)閺木渲杏蓅oon這一實(shí)踐狀語。
【典例2】(2008·山東卷)_____ was most important to her, she told me, was her family.
A. It B. This C. What D. As
【答案】C
【解析】she told me是插入語，可刪除。what引導(dǎo)主語從句，在從句中充當(dāng)主語。
有時(shí)為避免句子頭重腳輕，常用形式主語it代替主語從句作形式主語放于句首，而把主語從句置于句末。主語從句后的謂語動(dòng)詞一般用單數(shù)形式。常用句型如下:
(1)It + be + 名詞 + that從句
(2)It + be + 形容詞 + that從句
(3)It + be + 動(dòng)詞的過去分詞 + that從句
(4)It + 不及物動(dòng)詞 + that 從句
另注意在主語從句中用來表示驚奇、不相信、惋惜、理應(yīng)如此等語氣時(shí)，謂語動(dòng)詞要用虛擬語氣“(should) +do”，常用的句型有:
It is necessary (important, natural, strange, etc.) that …
It is a pity (a shame, no wonder, etc.) that…
It is suggested (requested, proposed, desired, etc.) that…
【典例】(2009·天津卷)It is obvious to the students ______ they should get well prepared for their future.
A. as B. which C. whether D. that
【答案】D
【解析】考查名詞性從句。本空格處應(yīng)是一個(gè)主語從句的引導(dǎo)詞，因該主語從句不缺成分，且句意完整，故應(yīng)用不作任何成分的連詞that。
2.賓語從句
名詞句用作賓語的從句叫賓語從句。引導(dǎo)賓語從句的關(guān)聯(lián)詞與引導(dǎo)主語從句表語從句的關(guān)聯(lián)詞大致一樣，在句中可以作謂語動(dòng)詞或介詞及非謂語動(dòng)詞的賓語。
(1) 由連接詞that引導(dǎo)的賓語從句
由連接詞that引導(dǎo)賓語從句時(shí)，that在句中不擔(dān)任任何成分，在口語或非正式的文體中常被省去，但如從句是并列句時(shí),第二個(gè)分句前的that不可省。例如:
He has told me that he will go to Shanghai tomorrow. 他已經(jīng)告訴我他明天要去上海。
We must never think (that) we are good in everything while others are good in nothing. 我們決不能認(rèn)為自己什么都好，別人什么都不好。
注意:在demand，order，suggest，decide，insist，desire，request，command等表示要求、命令、建議、決定等意義的動(dòng)詞后，賓語從句常用“(should)+ 動(dòng)詞原形”。例如:
I insist that she (should) do her work alone. 我堅(jiān)持要她自己工作。
The commander ordered that troops (should) set off at once. 司令員命令部隊(duì)馬上出發(fā)。
(2)用who，whom, which, whose, what, when, where, why, how, whoever, whatever, whichever等關(guān)聯(lián)詞引導(dǎo)的賓語從句相當(dāng)于特殊疑問句，應(yīng)注意句子語序要用陳述語序。例如:
I want to know what he has told you. 我想知道他告訴了你什么。
She always thinks of how she can work well. 她總是在想怎樣能把工作做好。
She will give whoever needs help a warm support. 凡需要幫助的人，她都會(huì)給予熱情的支持。
【典例1】(2008·北京卷)The companies are working together to create _______ they hope will be the best means of transport in the 21st century.
A. which B. that C. what D. who
【答案】C
【解析】create后為賓語從句，從句中they hope是插入語，可刪除。因?yàn)閺木渲腥鄙僦髡Z，所以用what引導(dǎo)該從句。
【典例2】(2009· 全國卷Ⅰ) Could I speak to is in charge of International Sales please?
A. who B. what C. whoever D. whatever
【答案】C
【解析】 考查名詞性從句。題干中介詞to后面為賓語從句，從句中缺少主語，因此填whoever。
(3)用whether或if引導(dǎo)的賓語從句，其主語和謂語的順序也不能顛倒，仍保持陳述句語序。此外，whether與if 在作“是否”的意思講時(shí)在下列情況下一般只能用whether，不用if:
a. 引導(dǎo)主語從句并在句首時(shí);b. 引導(dǎo)表語從句時(shí);c . 引導(dǎo)從句作介詞賓語時(shí);d. 從句后有“or not”時(shí);e. 后接動(dòng)詞不定式時(shí)。例如:
Whether there is life on the moon is an interesting question. 月球上有沒有生命是個(gè)有趣的問題。
The question is whether she should have a low opinion of the test?
Everything depends on whether we have enough money. 一切要看我們是否有足夠的錢。
I wonder whether he will come or not. 我想知道他來還是不來。
Can you tell me whether to go or to stay? 你能否告訴我是去還是留?
(4)注意賓語從句中的時(shí)態(tài)呼應(yīng)，當(dāng)主句動(dòng)詞是現(xiàn)在時(shí)，從句根據(jù)自身的句子情況，而使用
不同時(shí)態(tài)。例如:
he studies English every day. (從句用一般現(xiàn)在時(shí))
he studied English last term. (從句用一般過去時(shí))
I know (that) he will study English next year. (從句用一般將來時(shí))
he has studied English since 1998. (從句用現(xiàn)在完成時(shí))
當(dāng)主句動(dòng)詞是過去時(shí)態(tài)(could, would除外)，從句則要用相應(yīng)的過去時(shí)態(tài)，如一般過去時(shí)，過去進(jìn)行時(shí)，過去將來時(shí)等;當(dāng)從句表示的是客觀真理，科學(xué)原理，自然現(xiàn)象，則從句仍用現(xiàn)在時(shí)態(tài)。例如:
The teacher told us that Tom had left us for America.
(5)think, believe, imagine, suppose等等動(dòng)詞引起的否定性賓語從句中，要把上述主句中的動(dòng)詞變?yōu)榉穸ㄊ�。即將從句中的否定形式移到主句中。例�?
We don’t think you are here. 我們認(rèn)為你不在這。
I don’t believe he will do so. 我相信他不會(huì)這樣做。
3.表語從句
在句中作表語的從句叫表語從句。引導(dǎo)表語從句的關(guān)聯(lián)詞與引導(dǎo)主語從句的關(guān)聯(lián)詞大致一樣，表語從句位于連系動(dòng)詞后，有時(shí)用as if引導(dǎo)。其基本結(jié)構(gòu)為:主語 + 系動(dòng)詞 + that從句。例如:
The fact is that we have lost the game. 事實(shí)是我們已經(jīng)輸了這場比賽。
That’s just what I want. 這正是我想要的。
This is where our problem lies. 這就是我們的問題所在。
That is why he didn’t come to the meeting. 那就是他為什么不到會(huì)的原因。
It looks as if it is going to rain. 看上去天要下雨了。
需要注意的，當(dāng)主語是reason時(shí)，表語從句要用that引導(dǎo)而不是because。例如:
The reason why he was late was that he missed the train by one minute this morning .
【提撥】whether 可引導(dǎo)表語從句，但與之同義的if卻通常不用于引導(dǎo)表語從句。
【典例1】 (2009·山東卷)The little girl who got lost decided to remain ________she was and wait tor her mother.
A. where B. what C. how D. who
【答案】A
【解析】remain是系動(dòng)詞，后加表語從句，由句意可知，從句缺地點(diǎn)狀語，所以選A。
【典例2】(2008·天津卷)The last time we had grat fun was _______ we were visiting the Water Park.
A. where B. how C. when D. why
【答案】C
【解析】was后為表語從句，此處when與the last time相呼應(yīng)，根據(jù)句意可排除其他選項(xiàng)。
4. 同位語從句
同位語從句說明其前面的名詞的具體內(nèi)容。同位語從句通常由that引導(dǎo)，可用于同位語從句的名詞有advice，demand，doubt，fact，hope，idea，information，message，news，order，problem，promise，question，request，suggestion，truth，wish，word等。例如:
The news that we won the game is exciting. 我們贏得這場比賽的消息令人激動(dòng)。
I have no idea when he will come back home. 我不知道他什么時(shí)候回來。
The thought came to him that Mary had probably fallen ill. 他想到可能瑪麗生病了。
【典例】(2009· 重慶卷) We should consider the students’ request ________ the school library provide more books on popular science.
A. that B. when C. which D. where
【答案】A
【解析】考查名詞性從句。根據(jù)題意知，空格處是同位語從句的引導(dǎo)詞，修飾中心名詞request，且在句子中不充當(dāng)成分，故用that。這句話的意思是我們應(yīng)該考慮學(xué)生的這個(gè)要求，即學(xué)校圖書館應(yīng)該多提供一些大眾科學(xué)方面的書籍。
三、對(duì)比與用法
1.同位語從句和定語從句的區(qū)別:
that作為關(guān)系代詞，可以引導(dǎo)定語從句，充當(dāng)句子成分，在從句中作賓語時(shí)可以省略; that引導(dǎo)同位語從句時(shí)，起連詞的作用，沒有實(shí)際意義，不充當(dāng)句子成分，一般不能省略。
試比較下面兩個(gè)例句:
I had no idea that you were here.(that引導(dǎo)同位語從句，不能省略)
Have you got the idea(that)this book gives you of life in ancient Greece?(that引導(dǎo)定語從句，作賓語，可以省略)
2.that-從句作主語通常用it作先行詞，而將that-從句置于句末。
用it作形式主語的that-從句有以下四種不同的搭配關(guān)系:
a. It + be +形容詞+ that-從句
It is necessary that… 有必要……
It is important that… 重要的是……
It is obvious that… 很明顯……
b. It + be + -ed 分詞+ that-從句
It is believed that… 人們相信……
It is known to all that… 從所周知……
It has been decided that… 已決定……
c. It + be +名詞+ that-從句
It is common knowledge that… ……是常識(shí)
It is a surprise that… 令人驚奇的是……
It is a fact that… 事實(shí)是……
d. It +不及物動(dòng)詞+ that-分句
It appears that… 似乎……
It happens that… 碰巧……
It occurred to me that… 我突然想起……
It is quite clear that the whole project is doomed to failure.
很清楚，整個(gè)計(jì)劃注定要失敗。
It's a pity that you should have to leave.
你非走不可真是件憾事。
3.否定轉(zhuǎn)移
(1) 將think, believe, suppose, expect, fancy, imagine等動(dòng)詞后面賓語從句的否定詞轉(zhuǎn)移到主句中，即主句的謂語動(dòng)詞用否定式，而從句的謂語動(dòng)詞用肯定式。
I don't think I know you. 我想我并不認(rèn)識(shí)你。
I don' t believe he will come. 我相信他不回來。
注意:若謂語動(dòng)詞為hope,賓語從句中的否定詞不能轉(zhuǎn)移。
I hope you weren't ill. 我想你沒有生病吧。
(2)將seem, appear 等后的從句的否定轉(zhuǎn)移到前面。
It doesn't seem that they know where to go.
看來他們不知道往哪去。
It doesn't appear that we'll have a sunny day tomorrow.
看來我們明天不會(huì)碰上好天氣。
【備考策略】
考生對(duì)于名詞性從句的復(fù)習(xí)和應(yīng)試關(guān)鍵要把握每個(gè)引導(dǎo)詞的意義，因?yàn)樵趯?duì)于名詞性從句的考查中，引導(dǎo)詞在句子中都起作用，有意義，因此在分析句子結(jié)構(gòu)，對(duì)比辨別名詞性從句、狀語從句、強(qiáng)調(diào)句式后，最后還是要選擇引導(dǎo)詞;另外還要注意以下幾點(diǎn):
1.what 引導(dǎo)詞的考查，尤其位于介詞后引導(dǎo)的賓語從句以及引導(dǎo)名詞性從句時(shí)的雙重作用。
2.Whether和if 的區(qū)別，尤其注意他們的不同之處。
3.名詞性從句和其它從句的`兼容結(jié)構(gòu)測(cè)試。
4.句子語序和時(shí)態(tài)。
具體說:
1.掌握名詞性從句的分類功能
名詞性從句根據(jù)其在主句的功能作用又可分為主語從句、賓語從句、表語從句和同位語從句。
(1) 若從句在句中作主語為主語從句
(2) 若從句在句中作賓語為賓語從句
(3)若從句在句中作表語為表語從句
(4) 若從句在句中作同位語為同位語從句
2.掌握連詞的含義及分類
絕大多數(shù)名詞性從句的連詞都有其實(shí)在意義，稱為有義連詞，如what表“……的內(nèi)容”，when表“……的時(shí)間”，where表“……的地點(diǎn)”，why表“……的原因”，how表“如何;怎樣”，who表“誰”，if, whether表“是否”;沒有實(shí)在意義的連詞叫無義連詞，無義連詞只有that一個(gè)。
3.掌握名詞性從句的語序
名詞性從句用陳述語序。
4.掌握名詞性從句和其它從句之間的關(guān)系
有些連詞除引導(dǎo)名詞性從句外還可引導(dǎo)其它從句，應(yīng)掌握它們之間的關(guān)系。
(1) if ,whether表"是否"時(shí)引導(dǎo)名詞性從句;if表“如果”時(shí)引導(dǎo)條件狀語從句;whether表“無論是否;不管是否”時(shí)引導(dǎo)讓步狀語從句。
(2) when表“……的時(shí)間”，where表“……的地方”時(shí)引導(dǎo)名詞從句;when表“當(dāng)……的時(shí)候”引導(dǎo)時(shí)間狀語從句，where表“……的地方”，且修飾行為動(dòng)詞時(shí)，引導(dǎo)地點(diǎn)狀語從句;when, where從句作定語修飾先行詞時(shí)引導(dǎo)定語從句。
【專題突破】
高考中考查名詞性從句時(shí)，經(jīng)�？疾檫B接詞的選用。解題時(shí)應(yīng)先判斷從句的類型，然后判斷從句是否缺少成分以及意義是否完整，最后根據(jù)引導(dǎo)名詞性從句的連詞的特點(diǎn)確定特定的連接詞。要求學(xué)生在做題中要注意如下幾點(diǎn):
1.分析結(jié)構(gòu)，辨析名詞性從句和狀語從句;
2.理解句意，正確區(qū)別引導(dǎo)詞;
3.按照句意，出現(xiàn)那個(gè)引導(dǎo)詞意思，便選擇那個(gè)引導(dǎo)詞。
【專題鞏固】
1. A warm thought suddenly came to me _______I might use the pocket money to buy some flowers for my mother’s birthday .
A. if B. when C. that D. which
2. See the flag on top of the building ? That was _______ we did this morning.
A when B. which C. where D. what
3. The government has announced that a modern city will be set up in _______is still a wasteland now.
A. what B. which C. that D. where
4.Many people wrote articles on _______Liu Xiang had failed to compete in the event .
A. why B. what C. who D. that
5.The couple are spending their holiday on _______is described as one of the most beautiful islands.
A. that B. what C. which D. where
6.The book is meant to _______needs it .
A. who B. whoever C. whomever D. whom
7. In his speech, Premier Wen Jiabao points out that creativity is_______it takes to keep a nation highly competitive.
A. how B. what C. which D. that
8.The experience of the Chinese nation attests to a truth_______ a nation loses in times of disaster will be made up for by her progress.
A. that what B. what C. that D. what that
9._______has recently been done to provide more buses for the people ,a shortage of public vehicles remains a serious problem .
A. That B. What C. In spite of what D. Though what
10. _______is certain is _______prevention is more important than treatment.
A. It; that B. What; that C. As; what D. What; what
11. Nobody would stand out admitting the fact, for some reason, _______they lost the game.
A. that B. which C. what D. why
12.-The patient looks much better. _______is it that has made him_______he is today?
-Perhaps the special medicine and his family’s patient care.
A.What; that B.That; that C.What; what D.What; which
13. After three hours’ climbing , they reached _______ they thought was the place they’d been dreaming of .
A.what B.which C.where D.that
14. A plan has been put forward _______more graduates should go to work in the country
A. when B. that C. whether D. how
15.It is pretty well understood _______controls the flow of carbon dioxide in and out the atmosphere today.
A. that B. when C. what D. how
16.(2009· 湖南卷) She is very dear to us. We have been prepared to do _______it takes to save her life.
A. whichever B. however C. whatever D. whoever
17.(2009·陜西卷) The how- to book can be of help to _______wants to do the job.
A. who B. whomever C. no matter who D. whoever
18.(2009· 安徽卷) A good friend of mine from I was born showed up at my home right before I left for Beijing.
A. how B. whom C. when D. which
19.(2009·江蘇卷)Many young people in the West are expected to leave_______could be life’s most important decision-marriage-almost entirely up to luck.
A. as B. that C. which D. what
20. (2009·浙江卷)-Is there any possibility ______ you could pick me up at the airport?
-No problem.
A. when B. that C. whether D. what
【參考答案及解析】
1. C 句意:我腦海中突然出現(xiàn)一個(gè)溫情的念頭，用我的零花錢給媽媽買些鮮花作為她的生日禮物。本題考察名詞性從句用法。I might use the pocket money to buy some flowers for my mother’s birthday .做A warm thought 的同位語從句。中間被suddenly came to me隔開，增加了試題難度。此外，部分考生由于對(duì)同位語從句和定語從句不分，故錯(cuò)選D為答案。
2. D 表語從句中缺did的賓語。
3. A “_______is still a wasteland now .”做介詞in的賓語從句，從句中缺主語句意為:政府已經(jīng)宣布一座現(xiàn)代化的城市將在這片現(xiàn)在仍是廢墟的地方建成。
4. A“_______Liu Xiang had failed to compete in the event.”做介詞on的賓語，賓語從句中不缺主干，故排除B和C。另外that不引導(dǎo)介詞的賓語從句(固定搭配除外)，所以排除D。
5. B “_______is described as one of the most beautiful islands .”賓語從句，從句中缺少主語，
6. B whoever在賓語從句中做主語，部分學(xué)生，因?yàn)橹豢吹浇樵~to，誤認(rèn)為要添whomever做介詞的賓語。
7. B “_______it takes to keep a nation highly competitive.”做表語從句，從句中缺少takes的賓語，構(gòu)成 it takes sth to do sth 結(jié)構(gòu)。
8. A本題句子結(jié)構(gòu)比較復(fù)雜，“_______ a nation loses in times of disaster will be made up for by her progress”做a truth的同位語從句，同位語從句中_______ a nation loses in times of disaster為主語從句。本句共有兩個(gè)從句，故有兩個(gè)引導(dǎo)詞。句意為“中華民族的經(jīng)驗(yàn)證明了一個(gè)真理，即，一個(gè)民族在災(zāi)難中失去的，必將從民族的進(jìn)步中得到補(bǔ)償。
9. C “_______has recently been done to provide more buses for the people”在句中做讓步狀語,而D. Though what錯(cuò)誤, 因?yàn)? 一個(gè)單一的從句不能用兩個(gè)連詞引導(dǎo).句意: 盡管在為人們提供更多公交車這件事上, 投入了很多, 但是公交工具的缺乏, 仍然是個(gè)問題.
10.B “_______is certain”在句中做主語,主語從句缺少一個(gè)主語,需要用What; “_______prevention is more important than treatment .”系表語從句,句意與結(jié)構(gòu)完整,只有that,可以這樣用。
11.A“_______ they lost the game.”在句子中做the fact 的同位語從句,從句意思結(jié)構(gòu)完整,結(jié)構(gòu)完整。
12. C先將句子結(jié)構(gòu)理清楚，it is _______that has made him _______he is today 就可以判斷，第一個(gè)空是考察強(qiáng)調(diào)句型的特殊疑問形式;第二個(gè)空則是表語從句，表語從句中缺少he is的表語。句意:病人好多了，是什么使得他成為現(xiàn)在這個(gè)樣子。
13. A考生誤以為是地點(diǎn)狀語從句，誤選C.where。而reached是及物動(dòng)詞，后邊接的是賓語從句，賓語從句除去插入語they thought，應(yīng)該缺主語。
14.B 考察同位語從句，表達(dá)A plan的具體內(nèi)容，has been put forward將名詞與從句隔開，加大了難度。
15.C 主要測(cè)試主語從句。分析句子結(jié)構(gòu)可知:句子屬于形式主語格式;另外主句中缺少主語。雙重作用的引導(dǎo)詞只能是what。例如:It is still doubtful what he said at the meeting yesterday。昨天他在會(huì)上說的話仍然值得懷疑。
16.C 名詞性從句的引導(dǎo)詞。句意為:她對(duì)我們來說是非常寶貴，我們已經(jīng)準(zhǔn)備好做一切來拯救她的生命。
17.D 此處從句作介詞to的賓語，是名詞性從句，引導(dǎo)詞作從句的主語，指人，意思是:無論是誰，選D。
18.C 考查名詞性從句，介詞from后除了接代詞或名詞作賓語外，還可接介詞短語或副詞短語作賓語;由后面“I was born”可以推測(cè)from后面可以指時(shí)間，也可以指地點(diǎn)，再由所給的選項(xiàng)可得出答案。
19.D 考查名詞性從句。賓語從句中缺少主語，因此選what。
20. B考查同位語從句。此處是由what引導(dǎo)的同位語從句，表示“你有沒有可能來機(jī)場接我?”。所以選B項(xiàng)。
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