We use apostrophe s (’s), also known as possessive ’s, as a determiner to show that something belongs to someone or something:
Is that Martha's bag?
Turkey’s coastline is very beautiful.
We can use it in complex noun phrases :
Alex is her oldest daughter’s husband.
We can use two possessive ’s constructions in the same noun phrase:
We're invited to Anna’s daughter’s wedding.
We also use possessive ’s to talk about time and duration:
Is that yesterday’s document?
I’ve had one week’s holiday so far this year.
How do we form the possessive 's ?
| singular noun + ’s | plural noun + ’ |
| The boy’s bedroom (The bedroom belongs to one boy.) | The boys’ bedroom. (The bedroom belongs to more than one boy.) |
