Using the Preposition 比 (bǐ) to Introduce a Target of Comparison in Chinese

What Does the Preposition 比 (bǐ) Do?

In the HSK 2 grammar outline, 比 (bǐ) is classified as a preposition (介词, jiècí) whose specific role is to introduce an object or target (引出对象, yǐnchū duìxiàng). While English speakers often translate 比 (bǐ) simply as the word than, thinking of it strictly as an equivalent to than often leads to word-order mistakes.

In this comparison, 比 combines with the benchmark to form 比 + B. Put that phrase before the adjective describing A: 今天比昨天热. This rule concerns the comparison pattern taught here; Chinese also has other constructions in which a preposition or its phrase follows a verb.

Basic Sentence Structure and Word Order

To build a standard comparative sentence, place the subject first, follow it immediately with 比 (bǐ) and the target of comparison, and put the adjective at the end of the clause.

Notice that the adjective 热 (rè, hot) does not change its form. Chinese adjectives do not take suffixes like -er in hotter. The comparative meaning is already fully established by the prepositional phrase 比昨天 (bǐ zuótiān, compared to yesterday) sitting in front of the adjective.

Expressing Degree and Avoiding Common Adverb Errors

In a neutral descriptive sentence, 很 often links a subject with an adjective without strongly stressing very: 今天很热 can mean Today is hot. In the basic 比 comparison taught here, do not insert 很 or 非常 directly before the adjective: 今天比昨天很热 is unsuitable for the intended ordinary comparison. Use 今天比昨天热, or state the size of the difference after 热.

If you want to specify whether the difference between Subject A and Object B is small or large, you place a degree complement after the adjective instead of an adverb before it. Common HSK 2 expressions for this include 一点儿 (yīdiǎnr, a little bit) for a slight difference, and 多了 (duō le, much more) for a large difference.

更 (gèng, even more) and 还 (hái, still more) can precede the adjective in a 比 comparison. They emphasize the relative increase; the sentence does not require both items to meet an absolute threshold for that quality. Compare the position of 更 or 还 before the adjective with 一点儿 or 多了 after it.

Using 不比 (bù bǐ) to Express 'Not More Than'

To deny that A exceeds B using the 不比 pattern, put 不 immediately before 比: A + 不比 + B + adjective. This instruction concerns 不比; it is not a ban on all other negative predicates or comparison constructions.

Pay close attention to the exact meaning of 不比 (bù bǐ). It is used to refute an assumption that Subject A exceeds Object B. Saying that this shop's coffee is 不比 (bù bǐ) that shop's coffee expensive usually means they are roughly the same price (or at least that this one is not pricier). In everyday speech, if your goal is to state clearly that Subject A is less expensive or less tall than Object B, speakers frequently choose a different pattern using 没有 (méiyǒu), whereas 不比 (bù bǐ) specifically denies superiority or excess.

Distinguishing 比 (bǐ) from Other Object-Introducing Prepositions

Chinese has several prepositions that introduce a target or participant before the predicate, and they are not interchangeable. Understanding why you choose 比 (bǐ) requires looking at the relationship between Subject A and Object B:

• 比 (bǐ) introduces a benchmark specifically to establish a difference in degree or quality (A exceeds B in some attribute).
• By contrast, prepositions like 跟 (gēn, with) introduce a partner in a joint action or a target for testing similarity (such as checking whether two things are the same), rather than ranking one above the other.
• Prepositions like 给 (gěi, to/for) introduce a recipient or beneficiary of an action, not a standard of measurement.

In the pattern practised here, 比 introduces the benchmark for taller, faster, hotter or more expensive. Other Chinese constructions, including 没有 and 不如, can also express comparisons, but they organize the relationship differently.

Frequently asked questions