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可尝试扩展句子。越复杂的句子,分析结果越丰富。
Many new houses had been built and roads had been widened.
这是一个并列句,其使用并列连词 and 连接前后两个分句,使得两个分句之间存在并列关系。
Many new houses had been built
这是一个陈述句,其时态为过去完成时。
Many new houses主语
had been built谓语动词短语(复合结构)(被动语态)
roads had been widened.
这是一个陈述句,其时态为过去完成时。
它与分句 1 之间存在并列关系。
roads主语
had been widened谓语动词短语(复合结构)(被动语态)