it’s time to go .有什么语法

来源：学生作业帮编辑：大师作文网作业帮分类：综合作业时间：2024/11/11 13:07:42

这里的 it 是代词,表示时间,在句中作主语.
is 是系动词
time 是表语
to go 是动词不定式作后置定语
因此本句是 “主--系---表”结构的句式,it 并非形式主语.
如果it 作形式主语,那么后面的动词不定式就是真正的主语,而本句 To go is time .显然是不成立的,可见it 不是形式主语.
在下面的句子中 it 才是形式主语：
It is important to learn English well.=To learn English well is important.
再问： to go is time是语意不成立还是语法不成立呢~谢谢您！您说to go 是做谁的后置定语
再答： to go is time 显然是语意不成立。这里的不定式 to go 作 time 的定语。

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