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theteamleaderdidn'tknowwhoforthelossofthematchtheteamleaderdidn'tknowwhotoblameforthelossofthematch为什么who后面跟着toblame?我在网上搜到了类似的句子:Themotherdidn'tknowwhotoblameforthebrok

题目详情
the team leader didn't know who _____ for the loss of the match
the team leader didn't know who to blame for the loss of the match 为什么who后面跟着to blame?我在网上搜到了类似的句子:The mother didn't know who to blame for the broken glass as it happened while she was out.,求解释原因:

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答案和解析
这里用的是“疑问词+不定式”结构,此结构使用的条件是:有疑问词和动词,没有动作执行者.在句子中“疑问词+不定式”结构可以充当主语、宾语、表语.