Prepositions are words that are used to denote location and time. There are mainly two types of prepositions – preposition of place & time.

Preposition of place

Prepositions of place are words or phrases used before a noun, pronoun or noun phrase to show the location. For example, at, in, into, on, upon, over, above, under, below, between, among, beside, next to etc.

Preposition	Usage	Examples
At	1. To show position 2. Before smaller places 3. To indicate location of places	1. Turn right at the corner. 2. He lives in Shahapur at Warghade nagar. 3. James is at football training right now.
In	1. To denote position inside close places or places with some boundary 2. With towns and countries	1. She is in the garden.     2. They live and work in New York.
Into	1. To show movement from outside to inside of a place	1. The children ran into the house. 2. Students came into the classroom.
On	1. To denote position of any person or object at the top of and in contact with another surface	1. The ball is on the table. 2. He is carrying suitcase on his head.
Upon	1. To show movement to top of any surface	1. The cat jumped upon the table. 2. The squirrel climbed upon the tree.
Above	1. To show position higher as compared something else	1. She rented a room above a shop. 2. There is a mirror above the sink.
Over	1. To show position of something higher at a distance	1. The helicopter is flying over our heads. 2. There is a bridge over the river.
Under	1. To show position of something lower at a distance and directly beneath	1. We sat under the tree. 2. The cat is under the table.
Below	1. To indicate something at a lower level compared to something else	1. The sun had already sunk below the horizon. 2. The boat dipped below the surface of the water
Between	1. To indicate position between two things	1. There was a dog between a car and a bus. 2. The café is between the bank and D-mart.
Among	1. To indicate position surrounded by many things	1. The ancient temple was hidden among the trees. 2. I found him standing among the crowd.
Beside / Next to	1. To indicate position near something or someone	1. She kept the purse beside the telephone. 2. Dhruv always sits next to Piyush on the school bus.

Preposition of time

Prepositions of time are words or phrases used before a noun, pronoun or noun phrase to show the time. For example, at, in, on, by, till, until, between, about, since, from, for, before, ago, after, during, beyond etc.

Preposition	Usage	Examples
At	1. To indicate specific time	1. Tom arrived at lunchtime, at 1 pm.
In	1. To indicate time periods or intervals	1. John woke up suddenly in the night because he heard a noise. 2. We often go for a vacation in summer. 3. Nisha was born in 2010.
On	1. To indicate dates   2. To indicate days	1. Sarah has doctor’s appointment on 22nd June. 2. My party is on Saturday. 3. What are you doing on the weekend?
By	1. It means not later than or up to a point in time	1. Make sure you are home by eleven. 2. By 20th July, exams will be over.
Till / until	1. To indicate an activity that continues to a point in time and then stops	1. The summer holidays will be till / until 31st of May.
Between	1. To indicate an activity within a period of time	1. The restaurant is usually busy between 8 pm and 11 pm.
About	1. To indicate approximate time	1. It is about 10 O’clock. 2. We will be home by about 7 in the evening.
Since	1. To indicate only beginning point when end is not being mentioned	1. She has been waiting for you since 8 O’clock. 2. It has been raining since morning.
From	1. To indicate beginning point when end is being mentioned	1. Most people work from nine to five. 2. School will remain close from May to June.
For	1. To Indicate a time period or interval	1. He has been working in this company for 10 years. 2. I have been here for last one week.
Before	1. To indicate a prior time	1. I have not seen him before. 2. I have done this before.
Ago	1. To describe something in past	1. I met him two months ago. 2. It happened a long time ago.
After	1. To indicate a later time	1. I shall enter after you.
During	1. To Indicate a time period or interval	1. We get the sunlight during the day. 2. He was nervous during his exam.
Beyond	1. To indicate a time after something	1. Don’t remain there beyond midnight. 2. I cannot wait beyond three weeks.