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why do the children thank their mother?这句话为什么要加do呢？
网校学员uuv**在学习英语零基础直达大学四级【全额奖学金班】时提出了此问题，已有1人帮助了TA。
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同学你好why do the children thank their mother?
首先这句话是一个特殊疑问句，里面的特殊疑问词是why，特殊疑问句的构成是:特殊疑问词+一般疑问句。
一般疑问句的构成是把助词提前，所以就有了 do这个助词在前面。
举个例子why do you love me？what do you see？
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英语零基础直达大学四级【全额奖学金班】
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