作业帮高一英语补充的（老师原来教高三）英语中：what is konw； it is konw； as高一英语补充的（老师原来教高三）英语中：what is konw；it is konw；as is know to us all；的意思和用法.
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高一英语补充的（老师原来教高三）英语中：what is konw； it is konw； as高一英语补充的（老师原来教高三）英语中：what is konw；it is konw；as is know to us all；的意思和用法.
高一英语补充的（老师原来教高三）英语中：what is konw； it is konw； as
高一英语补充的（老师原来教高三）英语中：
what is konw；
it is konw；
as is know to us all；
的意思和用法.
高一英语补充的（老师原来教高三）英语中：what is konw； it is konw； as高一英语补充的（老师原来教高三）英语中：what is konw；it is konw；as is know to us all；的意思和用法.
1 what is konwn是 特殊疑问句 或名词性从句
作为名词性从句 what 是连接代词 作从句中的主语 该从句 可以作主语宾语表语
如 what is konwn is that the earth goes around the sun作主语
tell me what is konwn 作宾语
this is what is known 作表语
2 it is konwn；it 是人称代词作主语 is konwn是谓语
该句型 中 it 经常 代替主语从句作形式主语 后面 的主语从句作真主语
如 it is konwn that the earth goes around the sun .
3 as is known to us all；这是非限制性定语从句 as 是关系代词 代替后面的主句 并且在从句中作主语
如 as is known to us all, the earth goes around the sun .