介词口诀年、月、周前要用inin 1998, in may , in this week ,日子前面却不行。遇到某天要用onon saturday , on my birthday , on children's day上、下午晚上又是inin the morning , in the afternoon , in the evening 要说某日上下午用on换in才能行 , on monday morning ,at用在夜、时间前 at night , at 6:00, at 12:13说“差”要用to来顶8:50 ten to nine说“过”要用past8:10 ten past eight多说多练记真经小处at,大处inat the door ,at home ,at school in the world , in china , in beijing （小地方常用at ，大地方常用in ）步行、骑马、左右onon foot , on a horse , on the left , on the right收音、电话、值日onon the radio , on the phone , on duty交通工具要用byby bike , by plane医院、班级、人床in the hospital , in my class , in bed （人呆在床上常用in,而东西在床上常用on）