The difference and usage of in at on and of for.

in, at and on, of and for are different in meaning, usage and emphasis, and the usage is as follows:

1. Different usage

1.

2.at usage: used before traditional festivals, such as at Christmas.

3.on Usage: Used before a specific date, the day of the week, the day of the week, including the morning, afternoon and evening of that day.

4. Usage of:+infinitive, which means "about to do something".

5. usage of for: it is a coordinate conjunction, which leads to a coordinate clause, indicating that the tone of the reason is very weak.

Second, the meaning is different

1.in Meaning: in ...; In ... place; During ...; In respect of ...; Go into ...; In ...

2.at means? In; To; Reach

3.on Meaning:? On top of; Supported by ...; On (a certain day); About; Based on

4.of meaning: about; ... (to which the table belongs); Born in; Because

5.for means: for; Because; Representative; Go; Support; About; Give

Third, the emphasis is different

1.in Emphasis: refers to a certain three-dimensional space.

2.at emphasis: refers to a certain point in the spatial position.

3.on emphasis: refers to something touching the surface of another thing, or bordering a place, etc.

4.of emphasis: when about is used to express the "approximate" of time and quantity, the actual quantity may be more or less.

5. focus of for: generally, it is an inferential supplementary explanation or explanation of the result, which does not mean the direct cause, and a comma is added before for.