1. do you think 做插入语放在疑问句中时,一般放在特殊疑问词之后,其后全部要改用陈述句序.
如：How old is he? 变成：How old do you think he is?
2. 但是有时候特殊疑问词本身就是疑问句的主语时,加不加插入语do you think都一样,因为这种问句本身的句序既是疑问句序,又算是陈述句序.
如：Who is on duty today? 改成：Who do you think is on duty today?


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