Unit 4A

Possessive adjectives:

https://learnenglish.britishcouncil.org/grammar/english-grammar-reference/possessives-adjectives

https://www.english-4u.de/en/grammar-exercises/possessive-adjectives.htm (my, your, his, her, etc.)

Possessive 's:

https://learnenglish.britishcouncil.org/grammar/a1-a2-grammar/possessive-s