Generally by is used in passive voice.
Preposition "on" is used for the name of days.
Like Sunday, Monday, Tuesday etc.
Preposition means before a position.
A word placed before noun or a pronoun to show its relation to some other word in the sentence.
The teacher emphasized the need of discipline in life.
No “on” with emphasized.
Emphasize is a main verb not a noun here.
Tired of means اکتا جانا
Territory means domain, area or region.
We can use at to talk about group activities and shops/workplaces.
Examples: There were many guests at the meeting.
She works at Ibrahim`s company.
By and With
By = person
With = solid instrument
In = Liquid instrument
The tiger killed by a boy means لڑکے نے چیتے کو ماردیا
Generally in shows position of something or someone.
Use of At and In (For places)
At is used for small places. (villages, cities and towns)
In is used for large places and big cities, countries etc.
For example: He lives in Karachi.
The tiger killed by a boy.
The letter was written with a pen means خط قلم سے لکھا گیا
Addicted is generally followed by To.
Addicted to means لت لگ جانا