Sentences Using Comparative and Superlative Adjectives

1. My brother is younger than me, but my sister is the youngest in the family.
2. My grandfather is older than my father.
3. My mother is very helpful, but my aunt is the most helpful person I know.
4. My friend is lazier than me.
5. My father is taller than me, but my uncle is the tallest in the family.
6. My dog is quieter than my cat.