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可尝试扩展句子。越复杂的句子,分析结果越丰富。
An opinion is what someone believes is true but has not been proved.
这是一个复杂句。
An opinion is what someone believes is true but has not been proved.
An opinion主语
isbe 动词
what someone believes ··· proved.表语(从句)
what someone believes is true but has not been proved.
这是一个表语从句,其时态为现在完成时。
其满足特殊句型: 。详情请参考下文具体介绍。