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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 reason why he came late was that he didn't catch the early bus.
这是一个复杂句。
The reason why he came late was that he didn't catch the early bus.
The reason why ··· late主语
wasbe 动词
that he didn't ··· bus.表语(从句)
why he came late
这是一个定语从句,其时态为一般过去时。
he主语
came谓语动词
latehe didn't catch the early bus.
这是一个表语从句,其时态为一般过去时。
he主语
didn't catch •••谓语动词短语(复合结构)
the early bus.宾语