年、月、季节前用in, (如:in 2008, in September, in spring)
改用on来做代替, (如:on January 1,onWedesday)
上午、下午、晚上仍用in。 (如:in the morning/afternoon/evening)
若是某日上下午,也是用on才能行。 (如:on theevening of the Mid-autumn Day)
正午、夜里用at, (如:at noon, at night)
时、分用法也同理。 (如:, at two, at two)
如若“差”点须加to, (如:two to two)
如若“过”点改past。 (如:half past one)