Prepotition In, On, At

Preposition Usage:

in You use ‘in’ with periods of times and places.
Ex :
Ω in May
Ω in winter
Ω in New York

on You use ‘on’ with specific days
Ex :
 on Sunday
 on June 7

NOTE : America English : on the weekend OR on Weekends

at You use ‘at’ with specific times and specific places
Ex :
 At 6 o’clock
 At 6.00 a.m
 At night
 At school

NOTE : British English : at the weekend OR at Weekends

Of Its mean belonging to, relating to, or being part of something.
You use ‘of’ with noun and –ing forms
Ex :
a. The legs of the table
b. Of studying

Off Ex :
a) Get off
b) Put off
c) Off the glass

After/before Ex :
 Before winter
 Before June
 After summer
 After lunch time

For Ex :
 For one hour
 For a week
 For ages

From Ex :
From india
From 7 a.m until 9 a.m

During Ex :
 During our holiday
 During at night