Preposition In, On and 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 Friday
 on June 7
NOTE : America English : on the weekend OR on Weekends

at You use ‘at’ with specific times and specific places
Ex :
 At 7 o’clock
 At7.00m 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