a an in on at with specific usage with difference

The three common prepositions on, at, in can express time and place, but the specific usage is different, and most students are confused about them. Now if you remember the mnemonic, you can avoid all kinds of misuse of at, on, in.

1. on, in, at time

on "on a specific day" ①

"when a certain time", the gerund, arrival, death before; early, late The first sentence is ②, with in generally "on", "under", "late"; on is used for days, in is used for months, seasons, and years ③; the qualifying three times in should be changed. at is a point in time, "work", "moment" and "Christmas" ⑤. at noon (night), in the day, idiomatic phrases to remember.

Note: ①on means on a specific day and in the morning, afternoon and evening of a specific day.

Example On mother's Day, we should send flowers to our mother.

On my arrival home, I found he had gone already．

② When early, late used at the beginning of the sentence to modify the prepositional phrase, although the morning, afternoon, evening of a specific day, should be used in, the general reference to the general morning, afternoon, evening is also used in .

Example Early in the morning of National Day, I got up to catch the first bus to the zoo. Early in the morning of National Day, I got up to catch the first bus to the zoo.

My father begins work at 8:00 in the morning and stops work at 4:00 in the afternoon.

③In the future tense, "after a certain period of time" and "during ......" and "in a certain season, year or month" are used. "

Example I hear he'll be back in a month.

In the course of the last lesson in French, little Franz was listening to the master very attentively.

Xiao Ming was born in December of 2004.

4 When morning, afternoon, evening are qualified by a preterite or postterite, on is used instead of in.

Examples on a hot (summer) noon

on Monday morning

on the morning of March 8.

On the morning of March 8th in the morning of March 8th

⑤ At is used to indicate a certain time and moment and before work, Christmas.

Example We get up at eight o'clock.

My father are busily at work all day.

In western countries children get present from their parents at Christmas. In western countries, children get presents from their fathers at Christmas.

It's really about the difference between the prepositions in and on. The prepositions in and on are used differently in the following ways when they are used to indicate orientation:

in means in ......, within ......, e.g.

in the village

in the village

in the street

in the fields

in the woods

in the wall

in the wall, e.g., to put a nail in the wall

on means on a plane, e.g.:

on the

on the table

on the lake

on the wall

on the wall, e.g. to hang a picture on the flat surface of a wall

Compare this with:

We swim in the river. We have a house on the river.