问题描述：
when是引导时间壮语重句的,如果主句是过去时从句是过去进行时,那为什么句子是When he was young ,he...
when是引导时间壮语重句的,如果主句是过去时从句是过去进行时,那为什么句子是When he was young ,he heard about the story of Monkey King.而不是 When he was young ,he was hearing about the story of Monkey King呢?请详细回答,
when是引导时间壮语重句的,如果主句是过去时从句是过去进行时,那为什么句子是When he was young ,he heard about the story of Monkey King.而不是 When he was young ,he was hearing about the story of Monkey King呢?请详细回答,
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