比【bǐ】

比 compares two things. A goes first, B goes after 比, and the adjective comes last.

很 is dropped

A 比 sentence has no 很, 非常 or 太 in front of the adjective. The comparison already supplies the degree.

• × 他比我很高 → 他比我高
• × 今天比昨天非常冷 → 今天比昨天冷得多

How much goes after the adjective

How much taller, how much colder – all of it follows the adjective.

更 and 还 are the two words that can go in front of the adjective. Both mean "even", and 还 also says B was already high.

The negative is 没有, not 不比

To say A is not as tall as B, use 没有, with 那么 before the adjective if you like.

不比 exists but denies the comparison rather than reversing it: 我不比他高 means "I'm no taller than him", which allows them to be equal.

With a verb

A verb that describes how something is done takes 得, and the comparison follows it. 比 + B can also go before the verb.