名词性从句----主语从句 It is unknow what he did on earth? 句首用It is是为什么
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发布时间:2022-05-13 02:04
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时间:2023-11-08 17:25
原句是
What
he
did
on
earth
is
unknow.
主语从句What
he
did
on
earth是真正的主语,it是形式主语,is
是谓语。为了不让句子头重脚轻,用It代替真正主语
放在句首,主语从句What
he
did
on
earth放在后面。