1. At/In/On
These are very commonly used prepositions.At is used for a precise time.
In is used for months, years, centuries and long periods.
On is used for days and dates.
In is used for an enclosed space.
On is used for a surface.
2. At/In/To/Into
At shows stationary position or existing state while In shows movement. Eg:- She is at home.
- The train is in motion.
- He lives at Alwar in Rajasthan.
- A temple is situated at Madurai in Chennai.
- The train will arrive at six in the morning.
- He will meet you in the morning.
- He jumped into the river.
- There are three students in the class.
- Come in=enter.
- Get in=into the train.
- In the direction of – Turn to the right.
- Destination – I am going to Jaipur.
- Until – from Monday to Friday; five minutes to ten.
- Compared with- They prefer hockey to soccer.
- With indirect object- Please give it to me.
- As part of infinitive – I like to drive; he wants to help.
- In order to- We went to the store to buy soap.
- To the inside of- We stepped into the room.
- Change of condition- The boy changed into a man.
3. On/Onto
On can be used for both existing position and movement. Eg:- He was sitting on his bag.
- Snow fell on the hills.
On can also be used as an adverb. Eg: Go on, come one etc.
Onto is used when there is movement involving a change of level. Eg:
- People climbed onto their roofs.
- He lifted her onto the table.
4. With/by
With is used for instruments and By is used for agents. Eg:- The snake was killed by him with a stick.
- The letter was written by Suresh with a pencil.
5. Since/For/From
Since is often used with Present Perfect or Past Perfect tense. Since is used for point of time and never for a place, as; since 6 O’clock/last night/last Monday/since Morning/evening/Monday/January/2005 etc. Eg:- It has been raining since two O’clock.
- He had been ill since Monday.
- Since can also be used as an Adverb. Eg:
- He left school in 1983. I haven’t seen him since.
- It is two years since I last saw Tom.
- Boil it for two hours.
- He lived in this house for six months.
For is also used with a present perfect tense or past perfect tense for an action which extends up to the time of speaking. Eg:
- He has worked here for a year.
- It has been raining for two hours.
From can also be used of place. Eg: He is from Mumbai.
6. Ago/Before
Ago is used for past events while Before is used in reference to two events. Eg:- He came three days ago.
- The train had left before he reached the station.
7. Beside/Besides
- Beside and Besides have altogether different meanings. Don’t confuse beside with besides.
- Beside = at the side of. Eg: He was sitting beside Mia.
- Besides=in addition to/ as well as. Eg: He has a car besides a motor cycle.
8. For/During
- It rained all Sunday but stopped raining during the night.
- She was ill for a week, and during that week she ate nothing.
For may be used to denote purpose and may also be used before known periods. Eg:
- I went there for the summer.
- I rented my house for my holidays.
For has various other uses. Eg:
- He asked for ten. I paid six for it.
- I bought one for him.
- He has been ill for three days.
9. Below/Under/Beneath
Below and Under both mean lower than (in level) and sometimes either can be used. But under usually denotes physical contact and below denotes space between the things. Eg:- He put the books under the pillow.
- He placed the lamp below the almirah.
- I was wearing a sweater also under the jacket.
Below and under may also mean junior in rank. Eg:
- He is under me. Means that I am superior to him.
- He is working under me.
Below is used meaning opposite to above. Eg:
- The temperature can fall below 15 degree Celsius.
- Rainfall has been below average this year.
Beneath: Something that is beneath another thing is under the other thing. Eg:
- I could see the muscles of his shoulders beneath his T-shirt.
- I found pleasure in sitting beneath the trees.
Beneath could also mean ‘unworthy as per status’ or ‘in lower strata in social class’. Eg
- It is beneath his dignity to beg for money. (unworthy of him)
- She married beneath her. (into a lower social class)
10. In/Within
In means the maximum time limit, while within means the period up to which the work will be completed. Within a particular length of time before that length of time, while ‘in’ refers the maximum time requires for the completion of the job. Eg:- I will complete the work in a month.
- I can repair the car within two hours.
11. Between/Among
Between is normally used for two things or persons, but it can also be used of more when we have a definite number in mind and there is a close relationship/association within them. Eg:- He distributed his property between his two sons.
- I sat between my mom and dad.
Among is usually used for more than two persons or things when we have no definite number in mind. Eg:
- He was happy to be among friends again.
- I sat among rank holders.
12. Among/Amongst
Both have same meaning. Either of them can be used if followed by ‘the’. If followed by a word, beginning with a vowel ‘amongst’ be used. The use of amongst is usually found in literary writings. Eg:- He distributed the toffies among/amongst the poor.
- He distributed the toffies amongst us.
13. Of/Off
Of and Off are used in following situations referring:Of
- Location east of here; the middle of the road
- Possession a friend of mine; the sound of music
- Part of a group ; one of us; a member of the team
- Measurement of a cup of milk; two meters of snow
Off
- Not on; away from :Please keep off the grass
- At some distance from : There are islands off the coast
14. Above/Over
Above and over both mean ‘higher than’ and sometimes either can be used. Eg:- The helicopter hovered above/over us.
- White flags were waved above/over the buildings.
But over also mean covering/on the other side of/across. Eg:
- I put a cloth over her.
- He lives over this mountain.
- There is a bridge over the railway line.
Over can mean higher in rank. Eg: He is over me. (Means He is my immediate boss)
Over is also used with meals/food/ drink. Eg:
- We had a chat over a cup of tea. (While drinking tea)
- The matter was decided over the lunch.
Above is also used meaning earlier or previous. Eg: He lives at the above address. (Previously mentioned)