前面可加介词in，例如：

1.In every Tuesday evening, The Fifth Tone holds an English corner which invites professional English teachers as discussion guilders for every table.每周二的晚上，第五调都会邀请专职英语老师做每一桌的英语角主持人。

every Tuesday 前面不用加介词的，如果非要加就加on ，具体指某一天吧