Respuesta:
1. I am taller(tall) than my sister.
2. My mom thinks the cats are better(good) pets than dogs.
3. I want to have the biggest(big-superlative) car.
4. A blue whale is heavier(heavy) than twenty-five elephants.
5. You look thinner(thin) than the last month. Have you lost weight?
6. Bycicles are slower(slow) than cars.
7. She is the nicer(nice) person I know.
8. What is the best(good-superlative) film you've seen?
9. Computers are cheaper(cheap) than mobile phones.
10. Is your brother taller(tall) than you?
11. I think Spanish is easier(easy) than Japanese.
Explicación:
Los verbos menores de 3 sílabas solo se le agrega -er o r deendiendo del caso y en casos en donde terminen en "y" se cambia por -ier. Aquí hay algunos superlativos, por eso no concuerda muy bien, en los superlativos solo se agrega en la última parte -est.
