Comparison of adjectives with as ... as, not as...as

The blue car is not as fast as the red car.

The blue car is as fast as the red car.

The blue car is faster as the red car.

The blue car is not as fast the red car.

Peter is as tall as Fred.

Peter is not as Fred tall.

Peter is not as tall as Fred.

Peter is taller than Fred.

The violin is not as low as the cello.

The violin lower as the cello.

The violin is as low as the cello.

The violin is as low as not the cello.

This copy is not as bad as the other one.

This copy is as good as the other one.

This copy is better than the other one.

This copy is as bad as the other one.

The Clock Tower is not as tall as the Trellick Tower.

The Clock Tower is tall as the Trellick Tower.

The Clock Tower is taller than the Trellick Tower.

The Clock Tower is as tall as the Trellick Tower.

The London Eye is as tall as Big Ben.

The London Eye is not as high as Big Ben.

Big Ben is not as tall as the London Eye.

The London Eye is higher than Big Ben.

Grapefruit juice is as sweet as lemonade.

Grapefruit juice is sweet as lemonade.

Grapefruit juice is not as sweet as lemonade.

Lemonade is not as sweet as grapefruit juice .

Silver is not heavy as gold.

Gold is not as heavy as silver.

Silver is not as heavy as gold.

Silver is as heavy as gold.

Westminster Abbey is as old as St. Paul's Cathedral.

St. Paul's Cathedral is not as old as Westminster Abbey.

Westminster Abbey is not as old as St. Paul's Cathedral.

St. Paul's Cathedral is older than Westminster Abbey.

London is not as beautiful as Oxford.

London is as beautiful as Oxford.

Oxford is more beautiful than London.

Oxford is not as beautiful as London.