Comparative y superlative

1-This computer is better than that one.
2-She's stronger at chess than I am.
3-It's much colder today than it was yesterday.
4-Our car is bigger than your car.
5-This grammar topic is easier than most others.
6-I find science more difficult than mathematics.
7-Today's ESL lesson was more interesting than usual.
8-My sister is much taller than me.†
9-It's colder today than it was yesterday.
10 She's looking happier today.
11.This grammar topic is easier than the last one.
12 Why is everyone else luckier than me?
13 Russian grammar is more difficult than English grammar.
14My sister is much more intelligent than me.†
15 I find maths lessons more enjoyable than science lessons.

1- Juan is the best student in the class .
2-Juan is the worst student in the class.
3-In our solar system the planet Pluto is the furthest planet from the Sun.
4-This winter is the coldest, that I can remember.
5 The green hat is the smallest hat in the store.
6-I am the tallest, in my class
7-Today is the earliest that I came home all week.
8-She is the happiest, I have been seen her.
9-I have the craziest dog, I have ever seen.
10-The policeman are the most honest people that I know.
11-Our generation is the most modern.
12-That is the most expensive dress in the store.
13-This problem is the most difficult, that I have had to solve in my life.
14-These shoes are the most comfortable.
15 My house is the biggest on the block.