write the sentences in a different way use (not) as...as

George is not as lazy as Alan.
I am as tall as Jack.
A zebra`s legs are not as long as a giraffe`s.
I am as good as Olga at Maths.
My hair is as dark as my mother`s.
I don`t think Matt`s idea is as good as yours.
The lasagne was not as bad as the pizza.