The boy____in the teacher's office was found somking yesterday.
问题描述：
The boy____in the teacher's office was found somking yesterday.
The boy____in the teacher's office was found smoking esterday.
A.standing B.stood
求解释啊啊为什么不用stood?
答
A 这里是动词的ing形式作定语,表示主动,谓语动词是was found.
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