On refers to the morning or afternoon of a certain day, including the day. Generally refers to the morning, afternoon, evening, etc. , but not specific, the scope is relatively large. At refers to a relatively short time point. What time is it now, this time, then, now, and so on.

First, the usage of on:

1, on indicates the time: for example, this morning, or afternoon, etc. Used in front of the week, date, etc.

2. Means location: beside what, near, near. For example: on my left or right, on the street, at the dining table, and so on.

3. Status: It refers to what you are engaged in, what you are, and what you are.

4. Say on the object. It means higher than what. Just like on a box.

Second, the usage of in

1, in terms of time, in stands for a long time, from the beginning to the end. Such as morning, afternoon, evening, year, month, day and season.

2, indicating the place, place, what is the significance and what is it.

3. Expression language, purpose and materials. For example: Japanese, English, Chinese, etc.

4, indicating the state, generally refers to wearing. For example: what kind of clothes to wear, what kind of hat to wear, etc.

Third, the usage of at.

1, indicating time: for example, a certain time point. What time do you get up, eat and so on every day?

2. At a certain time, opportunity, time, season, etc.

3. At what age. Also used in. For example, when I was 8 years old, 10 years old and so on.

4. In what way. Use at. For example. In work and life, etc.

At and in and on making sentences:

When making sentences:

1 and the peak unemployment rate is 17%.

The unemployment rate reached the highest point 17%. )

He was educated at the local comprehensive school first, and then at Oxford University.

He was educated at a local comprehensive school first, and then at Oxford University. )

He cheated at cards.

He cheated at cards. )

I am good at arithmetic at school.

I am good at arithmetic at school. )

She is good at playing chess.

She plays chess very well. )

When making sentences:

They live in Kensington's room.

They live in a rented house in Kensington. )

2. The marriage ended in a divorce of 1996.

The marriage ended in a divorce of 1996. )

In "Go away! The verb in this book is imperative mood.

(goaway！ The verb in in is a imperative mood verb. )

We went skiing in France in March.

We went skiing in France in March. )

Long hair for men became popular in the sixties.

Long hair for men became popular in the 1960s. )

About the sentence:

He turned and walked towards the hall.

He turned with his feet and walked down the corridor. )

His play is on Broadway.

His play was put on the Broadway stage. )

On Thursday, we will go out for a one-day tour.

We went on a trip for a day on Thursday. )

What's on TV?

What's on TV? )

He talked endlessly about how poor he was.

He kept crying about poverty. )