Compare them.
The boy is taller than the girl. / The girl's hair is longer than the boy's.
Compare them.
Dogs are friendlier than cats. ...
Compare them.
Giraffes are taller than zebras. ...
Compare them.
The girls have longer hair than the boys. / Boys are stronger than girls. ...
Compare them.
A train is more comfortable than a bus. ...
Compare them.
A car is slower than a plane.
Compare them.
A city is more crowded/noisier than the countryside.
Compare them.
The man is older than the girl. ...
Compare them.
The bird is faster than the snail.
Compare them.
The hippo is bigger than the crocodile.
Compare them.
Prague is cheaper/smaller than London.
What is it?
It's the highest mountain in the Czech Republic.
What is it?
It's the longest river in the world.
What is it?
It's the largest desert in the world.
What is it?
It's the biggest animal in the world.
What is it?
It's the fastest animal in the world.
