介词在日期时间前的用法介词在日期时间前的用法1、at 用在具体几点前 at 4oclock at half past twelve at a quarter past eight at weekend在周末 at night在晚上 at noon(在中午) 1、past 过 用在几点过几分前 at half past twelve at a quarter past eight 1、to 差 用在差几分到几点前 at ten to twelve at a quarter to eight 3、on在星期前 on Monday on Tuesday on Wednesday on Thursday on Friday on Saturday on Sunday2、in用在早晚前 in the morning in the evening in the afternoon at night 在晚上 at noon(在中午)