saturday afternoon前面用什么介词?on还是in?

Saturday afternoon前面用on还是in saturday afternoon前面用什么介词?on还是in? -----Saturday afternoon(介词） We went to the beach last Saturday afternoon.last前面用什么介词?还是不需用介词? Where did you go last Saturday afternoon? i clean my bedroom ____ Saturday afternoon. were you at the department store on saturday afternoon? i often go shopping with my mother 什么 saturday afternoon I will play football on saturday afternoon.(变为一般疑问句) They often v______ their friends on saturday afternoon We are going to play basketball_____ saturday afternoon at 4 :00 in the afternoon on Saturday? will you join us to play on Saturday afternoon? 是什么意思 Tom spends about half an hour___(swim)every Saturday afternoon. We are going to play basketball on saturday afternoon She climbed the mountain on last Saturday afternoon. They have a party ____ Saturday afternoon.at or in? We____ _____ _____ ____(have)a party this Saturday afternoon