Usage of adding time after in, at and on (note that adding time is more detailed)

1, at usually refers to an exact time, such as six o'clock.

2.in usually refers to a part of a day, such as morning (or even afternoon).

3.on specifies the morning or afternoon of the day, such as Monday morning in summer. Speaking of festivals.

4.at usually refers to the whole holiday, not just one day, such as Easter and Christmas.

5.on can refer to a day in a festival, such as Easter Monday after Easter and Christmas Day.

6. When talking about month, season, year or century, the preposition in is usually used, such as118th century, summer in March, and 1985 in 1985.

Second, the discrimination between reference and meaning.

In, in, in.

These prepositions all mean "at ..." When indicating place or time.

1, when at indicates the location, it refers to a certain point in the spatial position; A timetable refers to a certain moment.

2. The position in the table refers to a three-dimensional space range; Timetable refers to a period of time or time used together with year, month and quarter.

3. When 3.on indicates a place, it means that something is in contact with the surface of another thing, or bordering a place, etc. Time means a day or a certain time of a day, especially a day of the week.

Extended data:

First, the use of the word at

1, when used for time, can indicate time, such as at? In the evening, what time? At three o'clock, at? Dawn, in? It can also refer to a shorter time, as in? In the evening, what time? Monthly elementary school.

Where? When night means a certain time, it means "at dusk", and when it means a shorter time, it means "at night", usually at dusk or midnight.

2. Before it is used for envelope address, at can mean "transfer".

Second, on the use of words

1, the on before the date is often omitted.

2. Pay attention to the usage of in and on: on means "on the surface of an object" and in means "inside". The expressions that can be used are morning, afternoon, evening and evening.

Can only be expressed in on? The next morning, at? The next afternoon, at? The night before, at? The night before yesterday, at? 1 on the morning of June 6th, etc.

British people and Americans have different habits of using in and on. When expressing "in the newspaper, on the map, etc." The preposition is in, not on. When it means "hands and feet are injured", use the preposition in, and when it means "spots on hands and feet", use the preposition on.