Preposition - Purvasarg 

Preposition is a word that indiacates relationship between noun or pronoun and the other words in sentence. e.g. in, on, at, to, with, under, above, into, by, of, etc Preposition is always used before a noun or pronoun. 

Preposition vaha shabd hai jo noun ya pronoun ka vakya kay dusray shabdo kay beech ka sambandh batata hai. Preposition hamesha noun ya pronoun sey pahlay aata hai. 

Use of Preposition 

On or Upon > = Kay upar - jab koi cheej touch karay

My book is on the table. My pen is also on the table

Meri pustak table par hai. Mera pen bhi table par hai.

Over > = Kay upar - jab koi cheej touch na karay

The fan is over my head. The clock is over Madhur's head.

Pankha meray seer kay upar hai. Ghadi Madhur kay seer kay upar hai.

In > = Main

We are sitting in the drawing room. Rajani is living in Mumbai.

Ham drawing room main baithay hai. Rajani Mumbai main rahti hai.

Into > = Main - jab koi cheej kisi main ghus jaaye

The boy jumped in the river. We entered in the cinema hall.

Ladkay pani main kood gaye. Hamnay cinema hall main pravesh kiya.

Within > = Kay andar

I shall finish this work within five days. Raman will come from Agra within five hours.

Main yaha kaam 5 din main khatma kar lunga. Raman Agra sey paanch ghantay main aa jayega.

Under > = kay neechay

My feet are under the table. The bag is lying under the chair.

Meray paon table kay nichay hai. Bag kursi kay nechay hai.

Of > = Ka, kay, kee

Prashant is brother of Shantur. He is a student of Birla School.

Ram Shantnu ka bhai hai. Vaha Birla school ka vidyarthee hai.

Off > = Sambandh vitchhaid ya rishto ka tutna

Switch off the light. Take off your clothes.

Bijli ka batan band karo. Apnay kapday utaro.

From > = Sey

Ankit has come from Delhi. India has taken loan from world bank.

Ankit Delhi sey aaya hai. India nay world bank sey loan liya hai.

For > = Kay liye

My heart is beating for you. I have brought a pencil for Viyaan.

Mera dil tumharay liye dhadak raha hai. Main Viyaan kay liye pencil laya hoon.

At > = Kay taraf

Why are you looking at me? He threw the ball at my side.

Tum meri taraf kyon dekh rahay ho? Usnay ball meri taraf phenki.

With > = Kay saath

I play with my friends. Avyan will go to school with us.

Main apnay dosto kay saath khelta hoon. Avyan hamaray saath school jayega.

By > = Kay dwara

This has been broken by Shyam. This letter has been written by Sarla.

Yaha Shyam kay dwara toda gaya hai. Yaha patra Sarla kay dwara likha gaya hai.

After > = Kay baad

Kanika will come from school after Vartika. Papa goes to office after Dadaji.

Kanika Vartka kay baad school sey aayegi. Papa Dadaji kay baad office jatay hai.

Against > = Kay virudh

Raj complains against Jay. India is playing against Pakistan.

Raj Jay kay virudh shikayat karta hai. India Pakistan kay khilaaf khel raha hai.

About > = Baray main

Tell me something about your city. Tell about your success.

Apnay shahar kay baray main kuchh batao. Apni safalta kay baray main batao.

More examples 

Prepositions - At, In and On are very commonly used in English. More examples of its meaning and use with reference to 'Time' and 'Place' is given below: 

Preposition -At, In and On, English main bahut jyada istemaal hotay hai. Samay aur sthan kay sandarbh main inkay aur udaharan nichay diye hai. 

At
for a specific place/a point > = Kisi nishchit sthan ya point kay liye

e.g. at college, at home, at school, at the bottom, at the bus stop, at the corner, at the door, at the end of the road, at the enterance, at the party, at the top, at university, at work, at school, etc

Please see at the bottom of the box. He is meeting her at the bus stop. He is at home. He will be available at his work. He will always remain at the top.

Box kay talay main dekho. Vaha usay bus stop par mil raha hai. Vaha ghar par hai. Vaha kaam kay sthan par milega. Vaha hamesha shikhar par rahega.

At
for a precise time > = Kisi nishchit samay kay liye

e.g. 5 o'clock, 05.30 am, at noon, at dinnertime, at bedtime, at sunrise, at sunset, at the moment, at right moment, at night, at the weekend.

Please wake up at 05.30 am. Let us discuss the issues at dinnertime. No fighting at bedtime. Birds start chirping at sunrise. I am busy at the moment. You have come at the right moment. We shall go to Mumbai at the weekend.

Kripaya subah 05.30 bajay uthay. Aaiye maslo par dinner kay samay charcha karay. Sonay kay samay koi ladayee naha. Suryodaya par pakshi chechahana shuru kartay hai. Is kshan main vyast hoon. Saptahant par hum Mumbai jayengay.

In 
for a place having some boundary (enclosed area) > = Aisa sthan jiski kisi prakar ki boundary ho

e.g. in a boat, in a box, in a car, in a lift, in a row, in a taxi, in Delhi, in my pocket, in the garden, in the kitchen, in the newspaper, in the sky, in world.

We are going in a boat. Please keep everything in that box. Please do not go in lift for first floor. He has come in a taxi from Jaipur. The ticket is in my pocket. She is cooking in the kitchen. Detail of that incident is appearing in the newspaper. Kites are flying in the sky. There are no aliens in the world.

Ham boat main ja rahay hai. Kripaya saree vastuay dabbay main rakhay. Kripaya pehli manjil kay liye lift main na jaaye. Vaha Jaipur sey taxi main aaya hai. Ticket meri jaib main hai. Vaha rasoi main khana paka rahi hai. Us ghatna ki puri jankaari newspaper main dikh rahi hai. Patangay aakash main ud rahay hai. Aliens sansaar main nahi hai.

In 
for a particular time of day or month or year > = Din, mahinay ya saal kay nishchit samay kay liye.

In 2012, in the next century, in the ice age, in the past, in the future, in April, In winter, In summer, in the morning, in the evening, in the afternoon.

We visited London in 2012. Ordinary people can also go to the Moon in the next century. You should neither live in the past nor in the future. We shall celebrate the occasion in April. We should enjoy all games in winter. One should try to meditate in the morning.

Hamnay 2012 main London ghuma. Aam admi bhi agli sadee main Chand par ja sakta hai. Tumhay na to bhootkaal main rahna chahiye na bhavishyakaal main. Ham April main avsar ko manaayengay. Ham sardiyon main sabhi games ka maja lengay. Subah kay samay dhyan lagana chahiye.

On
for a surface of thing > = Kisi stah par

e.g. on a bicycle, on a motorbike, on a bus, on a horse, on a train, on public transport, on television, on radio, on the ceiling, on the door, on the floor, on the left, on the right, on the table, on the wall, on the way.

He is riding on a motorbike. He goes to office on a bus. We met on a train. That programme is coming on television. He is listening news on radio. The picture is hanging on the door. She is appearing on the left side of Bride (Dulhan). Meal has been served on the table. Please do not write slogans on the wall. Let us discuss everything on the way.

Vaha motorbike par savari kar raha hai. Vaha office bus main jata hai. Ham train main Miley. Vaha programme television par aa raha hai. Vaha radio per news sun raha hai. Picture darwajay par latak rahi hai. Vaha dulhan kay banyee taraf dikh rahi hai. Khana table par laga diya hai. Kripaya deewar par naray na likhay. Aaaiye saari batey rastey main charcha karey.

On
for a particular day or date > = kisi khas din ya tareekh kay liye

e.g. On 4th November, on 27th September, 2012, on Independence day, on my birthday, on New Year's evening, on Sunday, on Tuesday morning.

We bought first computer on 4th November. He has come on 27th September, 2012. We shall have holiday on the Independence day. All had come on my birthday. He is getting married on New Year's evening. We shall reach India on Saturday morning.

Hamnay pahla computer 4 november ko kharida tha. Vaha 27 September, 2012 ko aaya tha. Swatantrata Diwas par hamari chutti hogi. Merey janamdivas par sabhi aaye thay. Nayay saal ki shaam ko uski shaadi ho rahi hai. Hum shanivaar ki subah India pahunchengay.