in response to a gust of wind 直译是“对一阵风作出响应而移动”,即随风摆动,全句意思是“悬挂在天花板上的随风摆动的奇怪形状的东西对每个人来说都很熟悉。”oddly shaped forms是主语,后面that are suspended from the ceiling and move in response to a gust of wind 是定语从句修饰 oddly shaped forms(are suspended from the ceiling 和 move in response to a gust of wind 并列),后面 are quite familiar with to everybody 是系表结构做谓语,无宾语。