It 做形式主语的情况求解

Greenviewlouie · 发表于 2017-8-7 15:22:22

各位大神，我看到曼哈顿论坛，RON说it必须指代一个实际的名词，或者在一些exception的情况下可以用作形式主语，但必须是 “it + adj/adv + that 从句”

我想问问如果别的情况都不能用it做形式主语了吗？比如以下这些句子，觉得很常见，它们是错的吗（如果不符合GMAT里的语法规则，又该怎么改？）：
It will activate the program if you press the button.
It's not known who broke the window.
It usually causes damages to the machine when the temperature drops below zero.

QUOTE FROM RON
there is an EXCEPTION to the principle that a pronoun must stand for an actual noun.
here is that exception:

in the construction
it is/was ADJ that...
or
it is/was ADV that...
or
it is/was ADVERB PHRASE that...
the "it" DOES NOT have to stand for an actual noun.

note that the "THAT" after the adjective/adverb/adverb phrase is absolutely necessary.
END QUOTE

emmahiggins09 · 发表于 2017-8-8 00:29:54

楼主,

it is ....that...这是中学里学过的强调句式强调 it is 和 that 之间的词语

Greenviewlouie · 发表于 2017-8-8 09:46:31

MARK

Greenviewlouie · 发表于 2017-8-8 09:51:27

emmahiggins09 发表于 2017-8-8 00:29
楼主,

it is ....that...这是中学里学过的强调句式强调 it is 和 that 之间的词语

建议不要用中国中学的语法来解释GMAT，我觉得老外不一定都有所谓“强调句式”的概念，这个句式RON已经解释了是OK的；但我只是想知道在其他长主语情况下，代词的正确的使用情况，比如我列举的其他句子

cls99 · 发表于 2017-8-8 15:11:05

情况1： The “empty it” often serves to make sentences more indirect and wordy, so usually they are not correct on the GMAT.
Wordy & Indirect: it’s more expensive to dine out every night than to prepare one’s own meals at home.
Correct: Dining out every night is expensive than preparing one’s own meals at home.

情况2：Sometimes in certain circumstances, because of context, we need to emphasize that something is true contrary to general expectations. Under such circumstances, we reword a simple action (e.g. A does X) to emphasize either a significant or unexpected subject (e.g. It is A that does X) or a significant or unexpected object (e.g. It is X that A does.)

Greenviewlouie · 发表于 2017-8-8 16:15:10

cls99 发表于 2017-8-8 15:11
情况1： The “empty it” often serves to make sentences more indirect and wordy, so usually they are ...

谢谢你的回复，抱歉我可能没表达清楚我想问的；我想问的是由于主语很长的情况下，比如主语是一个句子所描述的事件，放在句子开头有可能会导致句子头重脚轻，句意模糊。情况一列举的例子是一个动作to dine 作主语，情况二是一个简单名词A作主语。

我的问题是，如果主语是一个需要用一句话阐述的“事件”，怎样写才会符合GMAT的规则？比如我觉得那几个例子，怎么改会比较好？一些复杂一点的句子可能不能简化成 "dinning out every night"这样的

举个例子比如 It's very inspiring that you helped me understand this GMAT question，就好过 That you helped me understand this GMAT question is very inspiring，但其他不属于 “it's + adj + that 从句” 的情况呢？

emmahiggins09 · 发表于 2017-8-8 19:00:43

Greenviewlouie 发表于 2017-8-8 09:51
建议不要用中国中学的语法来解释GMAT，我觉得老外不一定都有所谓“强调句式”的概念，这个句式RON已经解 ...

楼主，虽然中国的语法有很多说的是不对的，但是这个说的还是对的。

emmahiggins09 · 发表于 2017-8-8 19:08:22

Greenviewlouie 发表于 2017-8-8 16:15
谢谢你的回复，抱歉我可能没表达清楚我想问的；我想问的是由于主语很长的情况下，比如主语是一个句子所描 ...

楼主可以看看曼哈顿语法里专门有一章写 placeholder it 的

Greenviewlouie · 发表于 2017-8-9 11:05:15

emmahiggins09 发表于 2017-8-8 19:08
楼主可以看看曼哈顿语法里专门有一章写 placeholder it 的

谢谢，我可能太久没看曼哈顿语法书，都忘记了。看了看讲placeholder it的，发现还是只说了infinitive 或者 that clause可以，其他的也没说。我觉得以后看到it多张个心眼吧

It 做形式主语的情况求解

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