作业帮it's amazing how much this helped是什么结构
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/16 10:16:48
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it's amazing how much this helped是什么结构
it's amazing how much this helped是什么结构
it's amazing how much this helped是什么结构
it作形式主语,指代实际的主语从句how much this helped.
如果把主语从句how much it helped放在主语的位置,那这个句子主语太长、谓语部分(is amazing)太短,头重脚轻了,为了使句子平衡,就用it作了形式主语,把实际的主语放在后面了.
这个结构可以总结为：
It is +形容词/名词 +主语从句/不定式/动名词.
eg:It is necassary that we should learn English.
It is necessary (for us) to learn English.
It is no use arguing with him.
it is +adj。结构
这是一个主语从句，句中it做形式主语，真正主语是后面的how much this helped
原句应该是how much this helped is amazing。
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用it 作形式主语的主语从句。 该句原句为 How much this helped is amazing .将主语how much this helped 放在末尾，用it做形式主语，可以避免句子结构头重脚轻。
是宾语从句