句型：not as/so + ADJ/ADV + as + N

　　结构︰not as/so+形容词/副词+as+名词

　　说明︰此句型意为“不像…那样…”。as…as 可用于肯定句或<否定句>，而 so…as 仅可用于<否定句>构中。

　　It is not as (so) popular as other foods.

　　它不像其它食物那样受欢迎。

　　He does not study as (so) hard as John.

　　他不像约翰那样用功。

　　I am not as (so) careful as Tom.

　　我不像汤姆那样细心。