您是问将句子 "He used to be smart." 变为一般疑问句并做出肯定和否定回答。
一般疑问句: Did he used to be smart?
肯定回答:Yes, he did.
否定回答:No, he didn't.
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您是问将句子 "He used to be smart." 变为一般疑问句并做出肯定和否定回答。
一般疑问句: Did he used to be smart?
肯定回答:Yes, he did.
否定回答:No, he didn't.