为什么是on Friday afternoon而不是in the Friday afternoon

为什么是on Friday afternoon而不是in the Friday afternoon Friday afternoon前面的介词是什么是on还是in啊,,为什么是= =. i am having a surprise party for lana on Friday night中为什么是am having? Tom’ s father bought him a small shop,and Tom sold milk,butter,cheese,eggs and other things in it．His shop was in a small town,and it was open on Tuesday,Wednesday,Thursday,Friday,Saturd… and on Sunday morning,but it was closed on Sunday aftern on Friday evening 什么是black friday? 画线部分为 scienceWe have science on Friday.(对画线部分提问)______ ______ ______you have on Friday. We have a field trip on Friday(用next Friday改写)格式为We__ __ __ __ a field trip next Friday girl Friday为什么是得力的女助手的意思?Friday是星期五,但为什么girl Friday是得力的女助手的意思呢? I have PE on Friday.对on Friday提问 We,have,math,on,Friday. The ( ) will stop on Friday. 【高中英语】冠词---When did you last see your first teacher?---On ____ Friday last June,at ____ celebration of her 40th year of teaching.答案：a;the.第一处为什么是泛指而不是特指?求解释,谢谢帮助! what are you going to do next sunday?(on sunday)改写句子 I'm playing football now.(tomorroww aftern The date was like any in his life .Aftern school Bill walked past the shop on the street corner running on the playground为什么是on 为什么是on TV,on the radio try on的on为什么是副词?