What are the usage of AT in on time/location?

[The following information is collected from the Internet]

At, in, and on indicate the difference between time.

[In] I am a "elder sister", because I have followed for a long time. Specific usage:
1. indicates a long period of time (such as weeks, months, seasons, years, and centuries ). For example, in a week; In May; in spring/summer/autumn/winter; in 2008; in the 1990's.
2. indicates in the morning, afternoon, or evening. For example, in the morning/afternoon/evening.
3. In the daytime (in the daytime) is a fixed combination, which refers to the period from sunrise to sunset. The antgroup is in the night.
4. "In + for a period of time" indicates "after/below", which is often used in future. For example, in half an hour; in ten minutes; in a few days.

[On] I am "second sister", and the time I followed is mostly related to the date. Specific usage:
1. indicates a specific day (such as date, birthday, holiday, or day of the week ). For example, on May 4th, 1919; on Monday; on teachers 'day; on my birthday; on that day.
2. indicates the morning, afternoon, or evening of a day. For example, on the morning of July 2; on Sunday afternoon; on a cold winter evening.

[At] I am a "little girl", because it takes the shortest time to connect to me. Specific usage:
1. indicates a specific time point, that is, a few minutes. For example, at six o 'clock; at half past nine; at a quarter to six; at this time.
2. indicates a short period of time. For example, at noon; at this moment; at the end of a year; at the start of the concert.

Use the at, on, and in prefixes to fill in the blanks.
1. He came to my family _______ May, 1999.
2. He got home _______ midnight.
3. Tree Leaves begin to fall _______ September.
4. He went to Beijing _______ the morning of October 8th.
5. This matter happened ______the 1970's ______ his eighties.
6. He usually goes to see a film ______ Sunday.
7. Can you finish the task _______ a month?
8. He left his homeland _______ the age of thirty.
9. My family will move there ______ two months.
10. He is kind to her ______ times.

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Http://srrc.syepi.edu.cn/hhlt/yufa/FW_atonin.swf

 

 

 

At, in, and on indicate the difference between locations.

1. At indicates the location:

(1) used in small places. For example, I shall wait for you at the station.

(2) used before the house number. For example, he lives at 115 Zhongshan Road.

2. In indicates the location:

(1) used in a large place. For example, he lives in Shanghai.

(2) Although it is very small, if the speaker lives there, it can also be used in. Stores, schools, and authorities use at as a point and in as a place.

For example:

I met him at the post-office.

I'm now working in the post-office.

3. On indicates a location. It generally refers to contact with a surface or line, meaning "in ...... In ...... ".

For example:

The picture was hanging on the wall.

New York is on the Hudson River.