Let's complete the sentences using the correct comparative and superlative forms of the adjectives in brackets.
1. Irina started skating at a **younger** age than Ekaterina.
*Explanation:* We use the comparative form 'younger' because we are comparing Irina's age to Ekaterina's age.
2. He is the **tallest** boy in the class.
*Explanation:* We use the superlative form 'tallest' because he is the tallest out of all the boys in the class.
3. It's the **funniest** film I have ever seen.
*Explanation:* We use the superlative form 'funniest' because it is the funniest compared to all other films the speaker has seen.
4. She is **more intelligent than** him.
*Explanation:* We use the comparative construction 'more intelligent than' because 'intelligent' is a longer word. We are comparing her intelligence to his.
5. Jared Leto is the **most attractive** man in the world.
*Explanation:* We use the superlative form 'most attractive' because 'attractive' is a longer word. He is the most attractive compared to all men in the world.
6. Claire is **more beautiful than** Eva.
*Explanation:* We use the comparative construction 'more beautiful than' because 'beautiful' is a longer word. We are comparing Claire's beauty to Eva's.
7. She learns **quicker than** him.
*Explanation:* We use the comparative form 'quicker' because we are comparing the speed at which she learns to the speed at which he learns.
8. He spoke **more quietly than** her.
*Explanation:* We use the comparative construction 'more quietly than' because 'quietly' is an adverb. We are comparing how quietly he spoke to how quietly she spoke.
9. She ran **fastest** of all.
*Explanation:* We use the superlative form 'fastest' because she ran faster than everyone else.