on the Saturday morning和In the afternoon 为什么介词由on变为in,是因为特指的原因吗求讲解

The boy was born on Saturday 对Saturday 提问 ( )we go to the zoo on saturday? How does the writer feel on Saturday They have fun on the beach on saturday是什么意思 we are going on a trip to the zoo( )(on this saturday ,in this saturday ,this saturday ,in Tom often listens to the music on Saturday.改为疑问句：What( )Tom often ( )on Saturday? The film is on Saturday morning.对划线部分on Saturday morning提问 Tom often goes to the park on saturday怎么对the park和saturday进行提问 “on the morning of Saturday”还是“in the morning of Saturday”?RT The place the writer went to on saturday翻译 Saturday the were you at the department store on saturday afternoon? _____she_____(go)to the party on Saturday是个疑问句 What did you do on the Open Day last Saturday? tony does the housework on saturday.改为一般疑问句 she hardly ever goes to the movies on saturday How about the movie on Saturday evening. 这句话对吗 they were on the farm last saturday.改为否定句