The cheetah is the (fast) animal alive.
Fastest
That fish is the (strange) fish I've ever seen.
Strangest
They woke up (late) than her.
Later
Correct or Incorrect: That cat is coolest than me.
Incorrect (That cat is cooler than me.)
Spongebob is (happy) than Squidward.
Happier
That is the (small) cake I've ever seen!
Smallest
Correct or Incorrect: Other roads are as not as long as this one.
Incorrect (Other roads are not as long as this one.)
The cat is (small) than the dog.
Smaller
Mirabel is (_____) talented as Isabella, so they fight a lot.
Not as
I think math is the (difficult) subject.
Most difficult
Correct or Incorrect: That's the most biggest comb I've ever seen.
Incorrect (That's the biggest comb I've ever seen.)
Correct or Incorrect: Simone Biles is the best gymnast in the world.
Correct
Arizona is a desert, so it's (hot) than Osaka.
Hotter
Correct or Incorrect: I didn't do as well as you did on the test.
Correct
Soccer is (good) to watch than baseball.
Better
In America, English is (useful) than French.
More useful
Waking up in the morning is the (hard) part of the day.
Hardest
Correct or Incorrect: Puppies are cuter pets than fish.
Correct
Correct or Incorrect: Spiderman is cooler than Iron Man.
Correct
Rapunzel has (long) hair than most people.
Longer