Emerge构成一个常用的主语句型，it emerged that 引导主语从句

real

学习英语的学员们知道，emerge的基本意思是“出现，浮现”， 比如，gradually +emerge 逐渐显露， quickly + emerge 很快显露，eventually/ultimately +emerge 最终显露，等等。其实emerge还可以构成常用的一个英语句型：主语从句的句型。That引导的主语从句放在后面，前面用it + emerge的形式，其中it就是代表后面的that从句。这个句型在记叙类的英语文本中，经常出现。表示某个事实已经清楚了，被大家知晓了。
比如：It subsequently emerged that he had known about the deal all along. 随后的情况显示他一直都知道这件事情。
下面详细列举emerge的词汇的含义和用法。
先看英英解释的字典，再比较中英双解字典：
emerge
/ıˈmɚʤ/  verb  , emerg·es, emerged, emerg·ing [  no obj  ]
  1 a : to become known or apparent
   The facts emerged after a lengthy investigation.
   A simple pattern has emerged. [=become clear]
   Several possible candidates have emerged.
  1 b : to become known or regarded as something
   She has emerged as a leading contender in the field.
   His war record has emerged as a key issue in the election.
   The movie has (suddenly/quickly/rapidly) emerged as one of the year's most surprising hits.
  2 : to rise or appear from a hidden or unknown place or condition : to come out into view
   when land first emerged from the sea
   The cat emerged from its hiding place behind the couch.
   animals emerging from a long period of inactivity
  3
  — used to indicate the usually good state or condition of someone or something at the end of an event, process, etc.
   Both sides in the election remain confident that they will emerge victorious/triumphant. [=that they will win]
   He emerged unharmed from the accident. [=he was not harmed in the accident]

emerge
\ēˈmərj, ə̇ˈ-, -mə̄j, -məij\ intransitive verb
(-ed/-ing/-s)
Etymology: Latin emergere, from e- + mergere to dip, plunge — more at merge
1. : to rise from or as if from an enveloping fluid : come out into view
< when land first emerged from the sea >
< the sun emerges from eclipse >
< rays emerging from a prism >
< a road emerging from the park >
2. : to become revealed : become manifest : become known
< a new problem then emerged >
< it emerges that her past behavior was far from irreproachable >
< after long study there emerged an overall picture of conditions that was extremely disheartening >
3. : to come forth or rise from an inferior, obscure, or unfortunate position or condition into one of superiority, prominence, or success
< as the common people emerged from illiteracy >
< someone must emerge as a leader >
< emerged the unchallenged head of the state >
< the youngest runner emerged the victor >
4.
a. : to arise by emergent evolution
b. : to come into being through evolution
  < certain new viruses appear to have emerged in recent years >
  < there is no certainty as to the ancestors from which vertebrates emerged >

e∙merge
/ ɪˈmɚdʒ ; ɪˈmɜːdʒ /
◙verb [I]
1. to appear or come out from somewhere
• 浮现，出现:
»The flowers emerge in the spring.
  花儿在春天开放。
▪ [+ from ]
»The sun emerged from behind the clouds.
  太阳从云层后露了出来。
2. if facts emerge, they become known after being hidden or secret
• 〔事实〕显露，暴露; come out:
»Eventually the truth emerged.
   真相终于大白。
Later it emerged that the judge had employed an illegal immigrant. 后来情况明朗了，那个法官雇用了一名非法移民。
3. to come out of a difficult experience
• 〔从困境中〕摆脱出来，出头:
▪ [+ from ]
»She emerged from the divorce a stronger person.
  她走出离婚的阴影，变得更坚强了。
4. to begin to be known or noticed
• 开始被人所知; 兴起:
»a religious sect that emerged in the 1830s
  于 19 世纪 30 年代兴起的一个宗教派别
▪ [+ as ]
»Local government has recently emerged as a major issue.
  当地政府近来成为人们关注的主要问题。

emerge
/ iˈməːdʒ; NAmE iˈməːrdʒ /
verb
1.  [V]  ~ (from sth)  to come out of a dark, confined or hidden place
   (从隐蔽处或暗处)出现,浮现,露出:
   The swimmer emerged from the lake.
   游泳者从湖水中浮出来。
   She finally emerged from her room at noon.
   中午,她终于从屋里出来了。
   We emerged into bright sunlight.
   我们来到明媚的阳光下。
2. (of facts, ideas, etc. 事实、意见等) to become known
   暴露；露出真相；被知晓
   SYN  transpire :
  ▪ [V]
   No new evidence emerged during the investigation.
   调查过程中未发现新证据。
  ▪ [V that]
    It emerged that the company was going to be sold.
   事已清楚,这家公司准备出售。
3.  [V]  ~ (as sth)  to start to exist; to appear or become known
   露头；显现；显露:
   After the elections opposition groups began to emerge.
   经过选举,反对派开始露头。
   He emerged as a key figure in the campaign
   他已初露头角,成为这次运动的主要人物。
   the emerging markets of South Asia
   正在兴起的南亚市场
4.  [V]  ~ (from sth)  to survive a difficult situation or experience
   (从困境或苦难经历中)幸存下来,摆脱出来:
   She emerged from the scandal with her reputation intact.
   她在丑闻中安然无恙,名声丝毫未受影响。
• emer·gence / -dʒəns / noun [U] :
   the island's emergence from the sea 3 000 years ago
   3 000 年前这个岛从大海中露出
   the emergence of new technologies
   新技术的出现

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补充一个知识点，这种主语从句，表达方法很多，其实一个非常接近于这个用法，就是transpire（泄露，揭露，被人所知），这个词，相对比较正式， 比如：
It transpired that the gang had had a contact inside the bank.    据报这伙歹徒在银行里有内应。
It now transpires that he kept all the money for himself.  现已清楚，他把所有的钱都据为己有了。