时间介词1 a什么是英语介词？（English Prepersitions ）I will go to Shanghai on Monday.The class will begin at 8:30.The weather will turn cold in two months.2 a第一课时： 时间介词 in,on,at3 a 时间介词at:4 aJack gets up at 7:30.5 aThey often play basketball at 4:00 p.m.6 aWe often have lunch at noon.7 aThe man is watching TV at night.8 aat 表示时间点，1, 用在具体的几点前at 1:00, at 2:00, at2:30,2 ，用在正午，午夜at noon 正午at night 午夜 9 a 时间介词on : 表示具体的某一天，或者具体的某一天的时间段 10 a11 a1.We have piano class on Monday.2. We have piano class on Monday mornin
