To show that somebody owns something:
1. Add an
's after their name.
Tom's bike
My sister
's umbrella
2. Words that are plural (already end in an s, only get an (')
after the s.
The lions' dinner
My sisters' blowdryer
3. We use of for places and geographical reagions and things.
The capital of England.
The name of the city is Madrid.
The color of my socks are blue.