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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。
I was washing my face when suddenly someone knocked at the door.
这是一个复杂句。
I was washing my face
I主语
was washing •••谓语动词短语(复合结构)(进行时)
my face宾语
when suddenly someone ··· door.suddenly someone knocked at the door.
这是一个状语从句,其时态为一般过去时。
someone主语
knocked谓语动词
suddenly、at the door.