Prepositions of time IN, ON and AT - English grammar

source: Crown Academy of English      2018年1月2日
What is a preposition?
A preposition is a small word. We usually put prepositions before a noun or pronoun.
Prepositions show the relationship between a noun or pronoun with other words in a sentence.
In this lesson, you will learn how to use the prepositions of time in, on and at.
A preposition of time indicates WHEN something happens.

IN:
in + month
in + season
in + year
in + part of day
in the morning
in the afternoon
in the evening

ON: 
on + day of the week
If the event is a unique (one-time) event, the day of the week is singular:
Example: I have a meeting with my manager on Friday.
If the event is a regular event, the day of the week is plural:
Example: The bank is closed on Mondays. (every Monday)
on + date
on + special day

AT:
at + clock time
at + festival / special time of year
"at the weekend"
Example: I'm going to play football at the weekend.
"at the beginning of"
"at the end of"
What is the difference between "at night" and "in the night"?
"at night" refers to any night in general.
"in the night" refers a short specific moment during the night:

Private English lessons: https://goo.gl/QQNgGe
IELTS lessons and writing assessment: https://goo.gl/AaTbnQ
Prepositions of place IN, ON and AT: https://www.youtube.com/watch?v=_zhw3...
Prepositions of time BY and UNTIL: https://www.youtube.com/watch?v=RCYXO...
Parts of speech: https://www.youtube.com/watch?v=FDbhU...
Listening quiz - Time expressions: https://www.youtube.com/watch?v=Rgwdi...