It seemed more pleasant to listen to. 不定式做什么成分?

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It seemed more pleasant to listen to. 不定式做什么成分?

It seemed more pleasant to listen to. 不定式做什么成分?
It seemed more pleasant to listen to. 不定式做什么成分?

It seemed more pleasant to listen to. 不定式做什么成分?
在此动词不定式作主语,用it作形式主语 .
在很多情况下,人们通常用it作为形式上的主语,而把不定式移到谓语之后,使句子结构显得平稳一些.例如:
It's rude to turn your back to your teacher and refuse to answer.背对着老师,拒绝回答问题是不礼貌的.
It is impossible to learn a foreign language without making painstaking effort.想不下苦功就能学会外语是不可能的.
It seemed a pity to have wasted so much time.浪费了这么多时间,真是遗憾.

形式主语啊

这是状语从句,it作形式主语,不定式才是句子的真正主语,但这里 to lisent to 作状语。