Comparative is the name for the grammar used when comparing two things. The two basic ways to compare are using as .. as or than.
eg :
1. She's twice as old as her
sister.
2. He's not as stupid as he
looks!
3. I'm almost as good in
maths as in science.
4. This book is not as exciting as the
last one.
5. The cafeteria is not as crowded as usual.
6. Russian is not quite as difficult as Chinese.
