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2019年大學(xué)英語四級考試語法：名詞性從句
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。
17.1 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：
連接詞：that,whether,if 不充當從句的任何成分)
連接代詞：what, whatever, who, whoever, whom,
whose, which.
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充當形式主語。
It is not important who will go.
It is still unknown which team will win the match.
17.2 名詞性that-從句
1)由從屬連詞that引導(dǎo)的從句叫做名詞性that-從句。 That只起連接主句和從句的作用，在從句中不擔(dān)任任何成分，本身也沒有詞義。名詞性that-從句在句中能充當主 語、賓語、表語、同位語和形容詞賓語，例如：
主語：That he is still alive is sheer luck. 他還活著全靠運氣。
賓語：John said that he was leaving for London on Wednesday. 約翰說他星期三要到倫敦去。
表語：The fact is that he has not been seen recently. 事實是近來誰也沒有見過他。
同位語：The fact that he has not been seen recently disturbs everyone in his office.
近來誰也沒有見過他，這一事實令辦公室所有的人不安。
形容詞賓語：I am glad that you are satisfied with your job.
你對工作滿意我感到很高興。
2)That-從句作主語通常用it作先行詞，而將that-從句置于句末，例如：
It is quite clear that the whole project is doomed to failure. 很清楚，整個計劃注定要失敗。
It's a pity that you should have to leave. 你非走不可真是件憾事。
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
It is a surprise that… 令人驚奇的是……
It is a fact that… 事實是……
d. It +不及物動詞+ that-分句
It appears that… 似乎……
It happens that… 碰巧……
It occurred to me that… 我突然想起……
17.3 名詞性wh-從句
1)由wh-詞引導(dǎo)的名詞從句叫做名詞性wh-從句。Wh-詞包括who, whom,. whose, whoever, what, whatever, which, whichever等連接代詞和where, when, how, why等連接副詞。Wh-從句的語法功能除了和that-從句一樣外，還可充當介詞賓語、賓語補語和間接賓語等，例如：
主語： How the book will sell depends on its author. 書銷售如何取決于作者本人。
直接賓語：In one's own home one can do what one likes. 在自己家里可以隨心所欲。
間接賓語：The club will give whoever wins a prize.
俱樂部將給得勝者設(shè)獎。
表語： My question is who will take over president of the Foundation. 我的問題是誰將接任該基金會主席職位。
賓語補足語：She will name him whatever she wants to. 她高興給他起什么名字就取什么名字。
同位語： I have no idea when he will return.
我不知道他什么時候回來。
形容詞賓語：I'm not sure why she refused their invitation. 我尚不能肯定她為什么拒絕他們的邀請。
介詞賓語： That depends on where we shall go.
那取決于我們?nèi)ツ膬骸?BR> 2)Wh-從句作主語也常用先行詞it做形式主語，而將wh-從句置于句末，例如：
It is not yet decided who will do that job.
還沒決定誰做這項工作。
It remains unknown when they are going to get married. 他們何時結(jié)婚依然不明。
17.4 if, whether引導(dǎo)的名詞從句
1)yes-no型疑問從句
從屬連詞if, whether引導(dǎo)的名詞從句是由一般疑問句或選擇疑問轉(zhuǎn)化而來的，因此也分別被稱為yes-no型疑問句從句和選擇型疑問從句，其功能和wh-從句的功能相同， 例如：
主語：Whether the plan is feasible remains to be proved. 這一計劃是否可行還有等證實。
賓語：Let us know whether / if you can finish the article before Friday. 請讓我們知道你是否能在星期五以前把文章寫完。
表語：The point is whether we should lend him the money. 問題在于我們是否應(yīng)該借錢給他。
同位語：They are investigating the question whether the man is trustworthy. 他們調(diào)查他是否值得信賴。
形容詞賓語： She's doubtful whether we shall be able to come. 她懷疑我們是否能夠前來。
介詞賓語： I worry about whether he can pass through the crisis of his illness. 我擔(dān)心他是否能度過疾病的危險期。
2)選擇性疑問從句
選擇性疑問從句由關(guān)聯(lián)詞if/whether…or或whethe…or not構(gòu)成，例如：
Please tell me whether / if they are Swedish or Danish. 請告訴我他們是瑞典人還是丹麥人。
I don't care whether you like the plan or not.我不在乎你是否喜歡該計劃。
17.5 否定轉(zhuǎn)移
1) 將think, believe, suppose, expect, fancy, imagine等動詞后面賓語從句的否定詞轉(zhuǎn)移到主句中，即主句的謂語動詞用否定式，而從句的謂語動詞用肯定式。
I don't think I know you. 我想我并不認識你。
I don' t believe he will come. 我相信他不回來。
注意：若謂語動詞為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.
看來我們明天不會碰上好天氣。
3) 有時將動名詞，介詞短語或整個從句的否定轉(zhuǎn)變?yōu)閷χ^語動詞的否定。
I don't remember having ever seen such a man.
我記得從未見過這樣一個人。 (not否定動名詞短語 having…)
It's not a place where anyone would expect to see strange characters on the street.
在這里，人們不會想到在街上會碰上陌生的人。
(anyone 作主語，從句中的謂語動詞不能用否定形式。)
4) 有時狀語或狀語從句中否定可以轉(zhuǎn)移到謂語動詞前。
The ant is not gathering this for itself alone. (否定狀語) 螞蟻不只是為自己采食。
He was not ready to believe something just because Aristotle said so. (否定because狀語) 他并不因亞里斯多德說過如何如何，就輕信此事。
She had not been married many weeks when that man's younger brother saw her and was struck by her beauty. (否定狀語many weeks) 她結(jié)婚還不到幾個月，這個人的弟弟就看見她了，并對她的美貌著了迷。
2019年大學(xué)英語四級考試語法：定語從句
定語從句(Attributive Clauses)在句中做定語，修飾一個名詞或代詞，被修飾的名詞,詞組或代詞即先行詞。定語從句通常出現(xiàn)在先行詞之后，由關(guān)系詞(關(guān)系代詞或關(guān)系副詞)引出。
關(guān)系代詞有：who, whom, whose, that, which等。
關(guān)系副詞有：when, where, why等。
18.1 關(guān)系代詞引導(dǎo)的定語從句
關(guān)系代詞所代替的先行詞是人或物的名詞或代詞，并在句中充當主語、賓語、定語等成分。關(guān)系代詞在定語從句中作主語時，從句謂語動詞的人稱和數(shù)要和先行詞保持一致。
1)who, whom, that
這些詞代替的先行詞是人的名詞或代詞，在從句中所起作用如下：
Is he the man who/that wants to see you?
他就是你想見的人嗎?(who/that在從句中作主語)
He is the man whom/ that I saw yesterday.
他就是我昨天見的那個人。(whom/that在從句中作賓語)
2) Whose 用來指人或物，(只用作定語, 若指物，它還可以同of which互換), 例如：
They rushed over to help the man whose car had broken down. 那人車壞了，大家都跑過去幫忙。
Please pass me the book whose (of which) cover is green. 請遞給我那本綠皮的書。
3)which, that
它們所代替的先行詞是事物的名詞或代詞，在從句中可作主語、賓語等，例如：
A prosperity which / that had never been seen before appears in the countryside. 農(nóng)村出現(xiàn)了前所未有的繁榮。(which / that在句中作賓語)
The package (which / that) you are carrying is about to come unwrapped. 你拿的包快散了。(which / that在句中作賓語)
18.2 關(guān)系副詞引導(dǎo)的定語從句
關(guān)系副詞可代替的先行詞是時間、地點或理由的名詞，在從句中作狀語。
1)when, where, why
關(guān)系副詞when, where, why的含義相當于"介詞+ which"結(jié)構(gòu)，因此常常和"介詞+ which"結(jié)構(gòu)交替使用，例如：
There are occasions when (on which) one must yield. 任何人都有不得不屈服的時候。
Beijing is the place where (in which) I was born. 北京是我的出生地。
Is this the reason why (for which) he refused our offer? 這就是他拒絕我們幫助他的理由嗎?
2)that代替關(guān)系副詞
that可以用于表示時間、地點、方式、理由的名詞后取代when, where, why和"介詞+ which"引導(dǎo)的定語從句，在口語中that常被省略，例如：
His father died the year (that / when / in which) he was born. 他父親在他出生那年逝世了。
He is unlikely to find the place (that / where / in which) he lived forty years ago. 他不大可能找到他四十年前居住過的地方。
18.3 判斷關(guān)系代詞與關(guān)系副詞
方法二： 準確判斷先行詞在定語從句中的成分(主、謂、賓、定、狀)，也能正
確選擇出關(guān)系代詞/關(guān)系副詞。
例1. Is this museum ___ you visited a few days age?
A. where B. that C. on which D. the one
例2. Is this the museum ____ the exhibition was held.
A. where B. that C. on which D. the one
答案：例1 D，例2 A
例1變?yōu)榭隙ň洌?This museum is ___ you visited a few days ago.
例2變?yōu)榭隙ň洌?This is the museum ___ the exhibition was held.
在句1中，所缺部分為賓語，而where, that, on which都不能起到賓語的作用，只有the one既做了主句的表語，又可做從句的賓語，可以省略關(guān)系代詞，所以應(yīng)選D。
而句2中, 主、謂、賓俱全，從句部分為句子的狀語表地點，既可用副詞where，又因 in the museum詞組，可用介詞in + which 引導(dǎo)地點狀語。而此題中，介詞on 用的不對，所以選A。
關(guān)系詞的選擇依據(jù)在從句中所做的成分，先行詞在從句中做主、定、賓語時，選擇關(guān)系代詞 (who, whom, that, which, whose); 先行詞在從句中做狀語時，應(yīng)選擇關(guān)系副詞 ( where 地點狀語，when 時間狀語，why 原因狀語) 。
18.4 限制性和非限制性定語從句
1) 定語從句有限制性和非限制性兩種。限制性定語從句是先行詞不可缺少的部分，去掉它主句意思往往不明確;非限制性定語從句是先行詞的附加說明，去掉了也不會影響主句的意思，它與主句之間通常用逗號分開，例如：
This is the house which we bought last month. 這是我們上個月買的那幢房子。(限制性)
The house, which we bought last month, is very nice.這幢房子很漂亮，是我們上個月買的。(非限制性)
2) 當先行詞是專有名詞或物主代詞和指示代詞所修飾時，其后的定語從句通常是非限制性的，例如：
Charles Smith, who was my former teacher, retired last year. 查理·史密斯去年退休了，他曾經(jīng)是我的老師。
My house, which I bought last year, has got a lovely garden. 我去年買的的那幢房子帶著個漂亮的花園。
This novel, which I have read three times, is very touching. 這本小說很動人，我已經(jīng)讀了三遍。
3) 非限制性定語從句還能將整個主句作為先行詞, 對其進行修飾, 這時從句謂語動詞要用第三人稱單數(shù)，例如：
He seems not to have grasped what I meant, which greatly upsets me. 他似乎沒抓住我的意思，這使我心煩。
Liquid water changes to vapor, which is called evaporation. 液態(tài)水變?yōu)檎羝?，這就叫做蒸發(fā)。
說明：關(guān)系代詞that和關(guān)系副詞why不能引導(dǎo)非限制性定語從句。
18.5 介詞+關(guān)系詞
1)介詞后面的關(guān)系詞不能省略。
2)that前不能有介詞。
3) 某些在從句中充當時間，地點或原因狀語的"介詞+關(guān)系詞"結(jié)構(gòu)可以同關(guān)系副詞when 和where 互換。
This is the house in which I lived two years ago.
This is the house where I lived two years ago.
Do you remember the day on which you joined our club?
Do you remember the day when you joined our club?
18.6 as, which 非限定性定語從句
as 和which在引導(dǎo)非限制性定語從句時，這兩個關(guān)系代詞都指主句所表達的整個意思，且在定語從句中都可以作主語和賓語。但不同之處主要有兩點：
(1) as 引導(dǎo)的定語從句可置于句首，而which不可。
(2) as 代表前面的整個主句并在從句中作主語時，從句中的謂語必須是系動詞;若為行為動詞，則從句中的關(guān)系代詞只能用which.。
在本題中，prevent由于是行為動詞，所以正確選項應(yīng)為B。
As 的用法
例1. the same… as;such…as 中的as 是一種固定結(jié)構(gòu), 和……一樣……。
I have got into the same trouble as he (has).
例2. as可引導(dǎo)非限制性從句，常帶有'正如'。
As we know, smoking is harmful to one's health.
As is know, smoking is harmful to one's health.
As是關(guān)系代詞。例1中的as作know的賓語;例2中，它充當從句的主語，謂語動詞know要用被動式。
18.7 先行詞和關(guān)系詞二合一
1)Whoever spits in public will be punished here.
(Whoever 可以用 anyone who 代替)
2)The parents will use what they have to send their son to technical school.
(what 可以用all that代替)
18.8 what/whatever;that/what; who/whoever
1)what = the thing which;wh atever = anything
What you want has been sent here.
Whatever you want makes no difference to me.
2) who= the person that whoever= anyone who
(錯)Who breaks the law will be punished.
(錯)Whoever robbed the bank is not clear.
(對)Whoever breaks the law will be punished.
(對)Who robbed the bank is not clear.
3) that 和 what
當that引導(dǎo)定語從句時 ，通常用作關(guān)系代詞，而引導(dǎo)名詞性從句時，是個不充當任何成分的連接詞。賓語從句和表語從句中的that?？墒÷?。What只能引導(dǎo)名詞性從 句， 用作連接代詞，作從句的具體成分，且不能省略。
I think (that) you will like the stamps.
What we need is more practice.
18.9 關(guān)系代詞that 的用法
a) 在there be 句型中，只用that，不用which。
b) 在不定代詞，如：anything, nothing, the one, all, much, few, any, little等作先行詞時，只用that，不用which。
c) 先行詞有the only, the very修飾時，只用that。
d) 先行詞為序數(shù)詞、數(shù)詞、形容詞最高級時，只用that。.
e) 先行詞既有人，又有物時。
舉例：
All that is needed is a supply of oil.
所需的只是供油問題。
Finally, the thief handed everything that he had stolen to the police.
那賊最終把偷的全部東西交給了警察。