Words

words 'in' 'on' 'at' to tell about time.

In:

• in January/June/December etc...
• in 1978/1996/2001 etc..
• in the twenties/thirties/fifties etc..
• in a few weeks
• in a couple of days
• in the morning/afternoon/evening.

At:

• at six o' clock
• at 10:30
• at four p.m.
• at night

On:

• on Monday
• on Friday
• on 16^th August
• on October 22^nd
• On Diwali

  Words 'in' 'on' and 'at' to relate the places.

In:

• In countries / states / cities / towns

Examples:

     In India,in America

     In Andhra Pradesh, in Assam

     In Hyderabad,in Ranchi

     In Adilabad,In Nalgonda

• In a room / in a building / in a garden / in a park. ( Closed places )
• In the water / in the sea / in a river /.( water bodies )
• In a row / in a line / in a queue. ( with line )

At:

• At the bus-stop / at the door / at the cinema / at the end of the street / at work / at home. ( Places )e t
• At the top of the page / at the bottom of the page. ( places on a page )

On:

• On the ceiling / on the well / on the floor
• On the table / on the shelf / on the desk
• On the right / on the left ( directions )

In / on /at the corner

We say in the corner of a room,but at the corner/on the corner of a street.

In /at/on  the front.

• We say in the front / in the back of a car.
• We say at the front / at the back of buildings / groups of people.
• We say on the front / on the back of a piece of a paper

We have some words which come in this list: 

with,for,to,of,against,across,from,off,along,up,behind,between,beside,

in front of,opposite,into,over,near etc..

• In tells about resisting position where as into tells you about the movement.
• On shows the thing touches the surface of the object where as Over shows that there are not in contact.

And,So,Because

Look at these sentences.

I opened the door                                  I opened the door and I went into the garden

I went into the garden

I wanted a drink                                    I wanted a drink so I went to a cafe

I went to a cafe

I took an Umbrella                                I took an Umbrella because it was raining.

It was raining

Speaker        :              I,me,my,mine,my self

                                     we,us,our,ours,ourselves

Listener        :              you,your,yours,yourself,yourselves

Third person :             Male: he,him,his,himself

                                    Female: she,her,hers,herself

                                    For animals,things: it,its,itself