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可尝试扩展句子。越复杂的句子,分析结果越丰富。
He conducted a number of experiments in which he showed what electricity is.
这是一个复杂句。
He conducted a number of experiments in which he showed what electricity is.
He主语
conducted •••谓语动词短语
a number of ··· is.宾语
in which he showed what electricity is.
这是一个定语从句,其时态为一般过去时。
he主语
showed •••谓语动词短语
what electricity is.宾语
what electricity is.
这是一个宾语从句,其时态为一般现在时。
其满足特殊句型: 。详情请参考下文具体介绍。