Bob didn't do any cleaning in his office yesterday .they haven't any camera 首先找出动词，如后一题中的have ,在动词后加not ,有some就要改为 any ，因为some 用于肯定句any用于否定和疑问句。
1.bobn't did some cleaning in his office yesterday.
2.they don'thave some cameras .
把did改成didn’t（did not）
have改成haven’t（have not）
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