表示倍数:倍数+as+原级+as; 例如:Our school is twice as big as yours.
表示差数:数词+名词+比较级+than; 例如:You are ten kilos heavier than me.
表示相同:the same +名词+as; 例如:This coat is the same as that one.
表示不如:less+原级+than; 例如:She looks like less beautiful than she used to.
表示比喻:A as +adj+as B ……; 例如:You are as busy as bee.