请教一个OC IS问题It has recently been discovered that和It is a recent discovery that哪个更好啊?OC详解的解释是第二个的It是冗余的...不觉得

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请教一个OCIS问题Ithasrecentlybeendiscoveredthat和Itisarecentdiscoverythat哪个更好啊?OC详解的解释是第二个的It是冗余的...不觉得请教一个

请教一个OC IS问题It has recently been discovered that和It is a recent discovery that哪个更好啊?OC详解的解释是第二个的It是冗余的...不觉得
请教一个OC IS问题It has recently been discovered that和It is a recent discovery that哪个更好啊?
OC详解的解释是第二个的It是冗余的...不觉得

请教一个OC IS问题It has recently been discovered that和It is a recent discovery that哪个更好啊?OC详解的解释是第二个的It是冗余的...不觉得
1、这里的 it 是形式主语,指代拖后的 that 主语从句.这种用法是为避免冗长的主语放在仅有几个词的谓语部分前而使得整个句子显得头重脚轻的失重现象.
2、it is ...that 中,that clause 表示的是一个事实,也就是说“that 所引出来的这个事实是如何的”.
3、这种先行主语 it 指代 that 从句的用法,其表语仅限于形容词(包括分词转化来的形容词),或者仅限于谓语部分是被动语态,如:
* Is it certain that they will win?他们一定会赢吗(他们会赢的是个事实是确定的吗)?——形容词表语
* It is important that he do it at once.他立刻办这件事是至关重要的(他立刻办这件事的这个事实是至关重要的).——形容词表语,表示说话人的个人看法,从句要用虚拟语气
* It is known to everybody that the opposition faction has captured some parts of Tripoli.众所周知,反对派夺取了的黎波里部分地区(反对派夺取了的黎波里部分地区这个事实已经被广泛知道).—— 被动语态
* It has recently been discovered that there is carbohydrate on some celestial bodies.最近业已发现有些星球上有碳水化合物(这种事实)——被动语态
4、it is + 名词表语 其事实上的主语只限于不定式和动名词短语,作表语的名词指的是一种事情或东西,而非事实,因此不用于表示事实的 that 从句,如:
* It is a pleasure to talk with him.和他谈话是一种愉快是事情.——不定式
* It is no use crying over spilt milk.牛奶打翻了哭也没有用(无谓的后悔是没有用处的事情)——动名词
-- 如果用 that 从句作主语,句子中就会出现多余的重复,即冗余,显得很罗嗦,如:
* It is a pleasure that you talk with him.
——直接用不定式作主语就很简洁,谁与他谈话是不言自明的(你、我或人们),如果用从句,that 和 you 都是冗余.
* It is a recent discovery that there is carbohydrate on some celestial bodies.
——改为 carbohydrate on some celestial bodies is a recent discovery“carbohydrate” 就是“discovery”,句子简洁明了,因此形式主语 it 、连词 that 和 there is 都是冗余.

第一个短句比较好。
看一看这个句子:
It has recently been discovered that the Earth has a second moon.
第二个短句的问题不是 it 冗余,而是句子蹩脚。
比如,与其说
It is a recent discovery that the Earth has a second moon.

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第一个短句比较好。
看一看这个句子:
It has recently been discovered that the Earth has a second moon.
第二个短句的问题不是 it 冗余,而是句子蹩脚。
比如,与其说
It is a recent discovery that the Earth has a second moon.
我们这样说更好,更简洁:
The Earth's second moon is a recent discovery.

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