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可尝试扩展句子。越复杂的句子,分析结果越丰富。
Obviously, it is high time that we took some effective measures to solve the problem.
这是一个复杂句。
it is high time that we took some effective measures to solve the problem.
it形式主语
isbe 动词
high time表语(形容词)
that we took ··· problem.真实主语
Obviously,we took some effective measures to solve the problem.
这是一个主语从句,其时态为一般过去时。
we主语
took •••谓语动词短语
some effective measures ··· problem.宾语