1hot hotter (the) hottestsmall smaller (the) smallesthappy happier (the) happyestexpensive more expensive (the) most expensivebad worse (the) worstA horse is bigger than a dogMary is more polite than AnnA car is faster than a bike3Everest is the highest mountain in the worldA whale is the biggest animal on our planetHe is the oldest student in our class4 He is the oldest student in his groupYou are taller than meMy car is better than his