Be mindful of the use of article A.
1.My pencil is long.
2.That elephant is big.
3.A fox is a clever animal.
4.This restaurant is big!
5.A rabbit is a small animal.

Amazing! All the sentences below are grammatically correct.
1.My pencil is longer than your pencil.
2.This elephant is bigger than that elephant.
3.I am stronger than you.
4.This restaurant is bigger than that restaurant.
5.This rabbit is smaller than that rabbit.

Just remember that we put article THE before the superlative form of the adjective.
1.My pencil is the longest.
2.This elephant is the biggest in the world.
3.I am the strongest in the world.
4.This restaurant is the biggest in this town.
5.This pencil is the smallest in our classroom.

Good job, Kevin. Thank you for doing your homework.