Wear不能在以下场合使用：

1. 在机场安检中，不能穿着外套或衣物，而是要脱下衣物以便安检。例如："You must take off your jacket and wear only your shirt during the security check."
2. 在法庭上，要求穿正装或者正式服装。例如："You must wear a suit or formal attire when you appear in court."
3. 在医院就诊时也不允许穿特别的衣物。例如："When visiting the hospital, you must not wear clothes with loud colors or prints."