A は B ほど～ない (A wa B hodo ~ nai)
Explanation
Expressing that A is not as ~ as B; 'not as...as'
Formation
A は B ほど + い-Adjective stem (without い) + くない, な-Adjective + じゃない, Verb-negative potential form
Detailed Explanation
The A は B ほど～ない grammar point is used to express that A is not as ~ as B in some aspect. It can be translated as 'not as...as' in English. This structure is commonly used with い-adjectives (without い) and な-adjective. For verbs, you can use the negative potential form.
Examples
山田さんは鈴木さんほど背が高くない。
Yamada-san wa Suzuki-san hodo se ga takakunai.
Yamada is not as tall as Suzuki.
このリンゴはあのリンゴほど甘くない。
Kono ringo wa ano ringo hodo amakunai.
This apple is not as sweet as that apple.
彼は私ほど勉強ができない。
Kare wa watashi hodo benkyou ga dekinai.
He can't study as well as I can.
このレストランはあのレストランほど静かじゃない。
Kono resutoran wa ano resutoran hodo shizuka janai.
This restaurant is not as quiet as that restaurant.
Grammar content sourced from hanabira.org.