为什么说what are you doing Tuesday afternoon

为什么说what are you doing Tuesday afternoon What are you doing Tuesday afternoon 这句话为什么Tuesday afternoon What are you doing Tuesday afternoon?为什么时间状语前没有介词? What are you doing Tuesday afternoon.为什么不加on?（书上原句） What are you going Tuesday afternoon 这句话为什么Tuesday afternoon What are you doing Tuesday afternoon?句子中的Tuseday afternoon 前 what are you doing Friday afternoon?对么?为什么啊 what are you doing later this afternoon 你在做什么用英语说为什么是what are you doing 不是what do you doing啊 what are you doing 为什么不是is? 1.What were you doing last Tuesday morning?为什么没有时间介词? what lessons do they have----tuesday afternoon?填on,为什么