When the second noun is the subject of the second noun, we use genitive:
The volcano erupted: The volcano's eruption
Islam arrived: Islam's arrival
He fell in love with the milkman's daughter
It is used to express possession:
Mary has a book: Mary's book
This land belongs to bears: A bear's land
We use 'of' when we do not know who the subject of the action is:
The expulsion of the Moorish
We also use 'of' when there is an equivalence relation (A = B):
The reign of Spain
The wide territory of Mexico
The preposition 'of' is also used when something contain something else:
A cup of tea
A packet of crisps
A land of bears
The chest of monsters
This kind of structures are used in the following cases:
Type of/Kind of:
Mountain flowers
Water well
English work
My mother fishes river fish
Part of:
Aristotle hair
Possessive 's or ' (LiveWorksheets)
Arvind's Book (LiveWorksheets)
Belongings (LiveWorksheets)
Whose ball is this? (Liveworksheets)
This is Peter's Book (LiveWorksheets)
The Simpsons (LiveWorksheets)
Possessive Activities (LiveWorksheets)