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题目
It’s known to all that.改成what is known to all is that 中为什么要加is?
我说的意思是把it换成what,that后为什么要加is

提问时间:2020-07-18

答案
看:
It is known to all that A loves B.(主语从句)
=That A loves B is known to all.(主语从句)
= What is known to all is that A loves B.(主语从句加表语从句)
=A loves B,which is known to all (定语从句)
= As is known to all,A loves B.(插入语结构)
= A loving B is known to all.(动名词结构)
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