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Asisknowntoall与Itisknowntoall区别?用法有什么不同吗?

题目详情
As is known to all 与It is known to all 区别?用法有什么不同吗?
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答案和解析
有 As is known to all,the 2008 Olympic Games was a great success.总所周知,2008奥运会取得巨大的成功.It is known to all that the 2008 Olympic Games was a great success.总所周知,2008奥运会取得巨大的成功.对比后,不难发现,前者可以单独做伴随状语,而后者要接that引导的从句,名为主语从句,it只是形式主语.