问题: It's known to all//As it's known to all
It's known to all, learning English is not easy job.
请问这里为什么不用后都,两者的用法有什么区别?
是不是:
As it's known to all that + 句子.
解答:
两句话的语法结构是不同的.
第一句话中的it 是一个形式主语，真正的主语是后面的动名词短语。
As is known to all,the earth travels around the sun.
这是一个定语从句，as 指代后面的整句话，并且在从句中担当主语。The earth travels around the sun,as (which)is known to all.此句中的as可用 which替代。
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