at几点几分,在三餐时,在中午或晚上,在on具体某天或某天上午、下午或晚上in年、季、月或泛指上午、下午或晚上in,at,on这三个介词都可以表示时间,它们用法各异,非常容易引起混淆。为方便同学们记忆,请看下面的图示:①at常用来表示时间点,即表示“在几点(几分)”。如:attwoo’cl What time is it at a few moments, during meals, at noon or in the evening, on a specific day or day in the morning, afternoon or evening in the year, season, month, or in the morning, afternoon or evening in, at, on the three Prepositions can represent time. They have different usages and are very confusing. In order to facilitate the memory of the students, please see the following diagram: 1at is commonly used to indicate the time point, which means “at a few points.” Such as: attwoo’cl