It is sad that... that引導(dǎo)的是什么從句?
為你解答,這是主語從句,IT 為形式主語,真正主語為THAT 后面的從句
類似這樣主語從句還有下面的,請(qǐng)主語查看,如果滿意,請(qǐng)立即采納,謝謝!
高中英語14種復(fù)合句精品課程講解
什么叫名詞性從句?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(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】主語從句【二】表語從句 【三】賓語從句
【四】定語從句 【五】同位語從句 【六】狀語從句
【一】主語從句：在主句種充當(dāng)主語成分的從句叫主語從句,
引導(dǎo)主語從句的連詞有：從屬連詞；連接代詞；連接副詞
A 從屬連詞：that,whether.
從屬連詞；that,whether引導(dǎo)的主語從句在主語從句中不充當(dāng)任何成分,只起連接詞的作用,通常不可以省略.分句置于句首時(shí),that絕對(duì)不可以省略.如果是由It作形式主語,后面that可以省略.
1,有that 引導(dǎo)的主語從句如下：
1. That the driver could not control hiswar was obvious.=It was obvious（that）thedriver could not control his car.
2. Thatshe was chosen made us very happy.=it made us very happy that she was chosen
3. Thathe is still alive is sheer luck.=It is sheer luck that she is still alive他還活著全靠運(yùn)氣.
4. Thatthe whole project is doomed to failure is quite clear
=It isquite clear that the whole project is doomed to failure.　很清楚,整個(gè)計(jì)劃注定要失敗.
5. Thatyou should have to leave is a pity =It's a pity that you should have to leave.　你非走不可真是件憾事.
6. That he will refuse this piece of advice isimpossible.=It is impossible that he will refuse this piece of advice
7. That they should like each other is natural=It isnatural that they should like each other
8. Thathe will not come to the meeting this evening is true
=It istrue that he will not come to the meeting this evening
9. Thathe will help others is a fact
10. That theearth turns around the sun is known to all.=It is known to all that the earthturns around the sun.
11. That we can win is certain=It is certain that wecan win.
12. That you have made a mistake is a fact.=Itis a fact that you have made a mistake
13. It is ordered that we should leave at once.=Thatwe should leave at once is ordered
14. That you don’t like him is none of my business. =Itis none of my business that you don’t like him
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……
It’s certainthat… 肯定…
It is possiblethat...很可能……
It is unlikelythat...不可能……
It is necessary\important \natural\... that…
It is possible thatshe will come back tomorrow.
It is obviousthat this measure is effective.
b. It +be +V ed 分詞+ that-從句
It is known to allthat…　從所周知……
It has been decided that… 已決定……
It is said that………. 據(jù)說……
It is known to allthat...眾所周知……
It is reported that... 據(jù)報(bào)道……
It is believed that...據(jù)信……;人們相信……
It is suggested that + (should）do... 建議……
It must be admitted that…必須承認(rèn)……
It cannot be denied that… 不可否認(rèn)……
It must be pointed out that…需指出的是……
It was reported that 20 people were killed in theaccident.
It was suggested that we should eat more vegetable and do more exercise
c. It + be +名詞+ that-從句
It is a pity/shamethat... 遺憾的是……
It is a surprisethat…令人驚奇的是…
It is commonknowledge that… …是常識(shí)
It is common knowledge that…　是常識(shí)
It is a fact that…　事實(shí)是……
It was a pity thatwe lost the match.
It was a fact thathe cheated in the exam.
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 occurred to methat I forgot to send this letter
It happened that I came into the office at that time.
It is important(necessary / advisable /desirable / imperative / true / strange / possible ...)that ...需要注意的是,這類主語從句中,謂語動(dòng)詞很多為"(should)＋動(dòng)詞原形",即要用虛擬語氣.例如:
It isnecessary that several nurses (should) stay. 幾個(gè)護(hù)士留在這兒是很有必要的.
It isimperative that everyone (should) learn from practice. 每個(gè)人都應(yīng)該從實(shí)踐中學(xué)習(xí).
It isreported (well-known / hoped / thought / expected / said / believed / decided /suggested / ordered ...)that ...例如:It is said that many people waskilled in the earthquake. 據(jù)說很多人在這次地震中喪生了.
itseems(appears / doesn’t matter / makes no difference / ...)that ...
例如:It makesno difference whether he will attend the meeting or not.他是否會(huì)參加會(huì)議都無關(guān)緊要.
當(dāng)用it作形式主語,而將主語從句放在句尾時(shí),主語從句中的否定詞常要前移至主句中.例如:
Itdoesn’t seem that they are from the same university.It doesn’t appear that we’ll have a sunny daytomorrow.
if 不能用在主語從句中,而是用whether,如果主語從句放在句首,不能用if引導(dǎo),但是如果用it 做形式主語,而把主語從句放在句末時(shí),也可以用if引導(dǎo).或把if改為whether
If Mary really heard him is really doubtful.
正：It was doubtful if Maryreally heard him. 正:Whether Mary really heard him is really doubtful.
Whether he left (or not) is unknown Whether hewill come is not clear.
Whether it will rain or not) is not clear Whether he’ll come here isn’tclear.他是否會(huì)來這里還不清楚.
Whetherwe will go tomorrow )hasn’t been decided yet
Whether the meeting will be put off has not beendecided yet. Whether the policeman willcome is not certain.
Whether the 2000 Olympic Games will be held in Beijing is not known yet.
Whether we’ll go camping tomorrow depends on theweather.whether he likes the job is notclear.
.注意區(qū)分it 作形式主語的主語從句與強(qiáng)調(diào)句
強(qiáng)調(diào)句句型It is/was+被強(qiáng)調(diào)部分+that, 去掉It is/was, that,句子仍然成立.
It is natural that they should have different views. 主語從句
It is only lately that he had had a family himself. 強(qiáng)調(diào)句
What was it that he wanted?I don’t knowwhat it was that he wanted.
It was in the hotel where he stayed that we discussed the serious problem
8.注意it 作形式主語的主語從句和as引導(dǎo)非限制性定語從句引導(dǎo)的不同
It is known to all that the earth is round. As is known to all. the earth is round.
B連接代詞who ,what ,which,whatever,whichever,whoever (Who, whom, which, what可以和ever構(gòu)成合成詞,和what一樣引導(dǎo)從句,ever起到強(qiáng)調(diào)作用.此類主語從句不能用形式主語it引導(dǎo),它們?cè)诰渥又袚?dān)任成分,不能省略,語序?yàn)殛愂稣Z序)
What many scientists believe is thatthe earth is round …Who will take part in the meeting has not been decided.
Whoever breaks the law will be punished. Whichstudent will winis uncertain.
Whatever was said here must be kept secret. 這里說的話都應(yīng)當(dāng)保密.
Whoever makes mistakes must correct them. 凡犯了錯(cuò)誤的人都必須改正.
What is needed for success) is your hard work.Whocan join in the sport meet) is decided by the teacher
What he needs is that book.What he needs are some books.
What he needs are some books.Who he is and where he is from are important.
What he saw are the stars in the sky What he said at the meeting astonishedeverybody present
Whoever leaves the room last ought to turn off thelights.
C連接副詞when,where, how, why等.
Why they suddenly disappeared still remains amystery.When they will leave is notdecided.
Where she is from is unknown. How we will paint thehouse has not been decided.
When they will arrive has been told to the teacherWhere we will go tomorrow hasn’t been decidedyet
When he will come is not knownWhen he will come is a puzzle
Where we shall spend the holiday isn’t decided.Where he comes from is a mystery.
Conclusion:主語從句作主語時(shí),謂語動(dòng)詞一般用單數(shù)形式
主語從句的規(guī)律
規(guī)律一、主語從句一律用陳述語序,即主語在前,謂語在后.
規(guī)律二、連詞that 在從句中無實(shí)際意義,但不能省略.
規(guī)律三、whether 可以引導(dǎo)主語從句,放在句首,但if不能
規(guī)律四、主語從句中的連詞不能重疊使用
規(guī)律五、含主語從句的主句謂語動(dòng)詞多用單數(shù)第三人稱形式.
規(guī)律六、what 引導(dǎo)的主語從句,可根據(jù)表語決定主句動(dòng)詞的單復(fù)數(shù)形式
規(guī)律七、主語從句為了避免頭重腳輕現(xiàn)象,用 it 做形式主語,把從句放在后面.