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相似短语
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可尝试扩展句子。越复杂的句子,分析结果越丰富。
The accident is reported to have occurred on the first day in February.
这是一个简单句,只含有一个主谓结构,并且句子各成分都只由单词或短语构成。
The accident主语
is reported {主补}谓语动词短语(复合结构)(被动语态)
to have occurred ··· February.主语补足语(to do.不定式)