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HSK 5 Prepositions Introducing Targets and Objects: 替, 同, and 较
At HSK Level 5 of the supplied syllabus outline, the prepositions 替 (tì), 同 (tóng), and 较 (jiào) are grouped under prepositions that introduce targets or objects before the main predicate. They differ in both meaning and register: 替 introduces someone you act in place of or feel concern for, 同 formally introduces a co-participant or standard of alignment, and 较 formally introduces a baseline for comparison.
张经理今天开会，我替他去机场接客户。
Uses 替 + person before the verb phrase to show practical substitution.
× 今年上半年的出口总额较增长了去年同期百分之八。
Incorrect: In this context, 较 is a preposition that must be followed immediately by the comparison baseline (去年同期), not the verb (增长了). Replace with the word order in the corrected example.
Corrected example: 今年上半年的出口总额较去年同期增长了百分之八。
Read the full explanation and examples
How Prepositions Introduce Targets Before the Predicate
In the supplied HSK 3.0 syllabus outline, Level 5 groups 替 (tì), 同1 (tóng), and 较2 (jiào) under prepositions that introduce an object or target (引出对象). In Chinese grammar, prepositions (介词) combine with a noun phrase to form a prepositional phrase placed before the main verb or adjective predicate. While basic prepositions like 跟 (gēn) and 比 (bǐ) handle everyday conversation, mastering 替, 同, and 较 allows you to distinguish between everyday substitution, formal interaction, and written comparison.
替 (tì): Acting in Place of Someone or Feeling on Their Behalf
替 can introduce someone on whose behalf an action is done, someone whose task is taken over, or the person concerned in an emotion such as 替你高兴. Doing something for someone does not require taking over their entire task, and feeling happy for someone does not mean replacing their own happiness.
张经理今天开会，我替他去机场接客户。
Uses 替 + person before the verb phrase to show practical substitution.
听到你顺利通过了面试，大家都替你感到高兴。
替你 expresses being happy for you. It does not imply that you cannot feel happy yourself.
Unlike 为 (wèi), which can introduce broad, abstract goals or general beneficiaries (such as working for the future), 替 is much more concrete and personal. It works best in spoken and neutral written Chinese when a specific person is being replaced in a task or empathetically supported.
同 (tóng): Introducing Partners and Reference Points in Formal Contexts
As a preposition, 同 introduces an interaction partner, companion or reference point for comparison. It overlaps with 跟 and 和. 同 is useful in written and formal contexts, as in signing an agreement, but it is also possible in ordinary sentences such as 我同朋友去散步. Register and regional usage affect which form sounds most usual.
代表团明天将同当地企业签署合作协议。
Uses formal prepositional 同 to introduce the partner in an official bilateral action.
这件事的解决方案同我们最初的设想基本一致。
Uses 同 + target before 一致 to introduce a standard of alignment.
Common predicates describe interaction, companionship, similarity or difference: 同朋友商量, 同当地企业合作, 同原计划一致 and 同以往不同. The predicate need not describe a jointly performed reciprocal action. For everyday companionship, 跟 or 和 are straightforward learner choices; 同 is not automatically incorrect.
较 (jiào): Introducing a Comparison Baseline in Written Chinese
较 can be a degree adverb meaning “relatively,” as in 较大. In the prepositional use taught here, it introduces the comparison baseline, like 比 but usually with a more written or formal tone. The source labels this entry 较2; the number is not a ranking of how important the sense is.
今年上半年的出口总额较去年同期增长了百分之八。
较去年同期 introduces the comparison baseline before 增长. The eight-percent figure is invented for grammar practice, not a report of current export statistics.
新修订的管理办法较以往更加注重环境保护。
Uses 较 + time baseline (以往) before a predicate modified by 更加.
A baseline after 较 can be a time reference such as 去年同期 or 以往, or another item. The predicate may describe a change, a degree or a simple property: 这条路较那条路窄 is a written comparison. Growth verbs and 更加 are useful examples, not requirements that the predicate be a trend verb or two syllables long.
Register Contrasts and Common Learner Mistakes
- 替 vs. 帮 (bāng): 替 focuses on taking someone's place or feeling an emotion for their sake, whereas 帮 focuses on assisting someone without necessarily replacing them.
- 同, 跟 and 和 can all introduce companions or comparison references. 同 often fits written or formal communication, but it is not restricted to official documents.
- 比 is the usual learner choice across many everyday comparisons. Prepositional 较 is more written or formal in tone, but its following predicate can be a simple adjective as well as a change or degree phrase.
In the export example, keep 较去年同期 together before 增长了百分之八. The incorrect version splits the intended comparison phrase by moving 去年同期 after 增长了. This is a word-order error for that intended meaning; it does not mean that every verb immediately following 较 must be wrong, since 较 also has an adverbial use.
× 今年上半年的出口总额较增长了去年同期百分之八。
Incorrect: In this context, 较 is a preposition that must be followed immediately by the comparison baseline (去年同期), not the verb (增长了). Replace with the word order in the corrected example.
Corrected example: 今年上半年的出口总额较去年同期增长了百分之八。
In the incorrect sentence above, placing the verb 增长了 right after 较 leaves the preposition without its comparison object and breaks the clause structure. Keep 较 + comparison target together as a single unit before the predicate.
Frequently asked questions
Can I always swap 替 and 帮?
They overlap, but are not always interchangeable. 替 highlights acting for someone, taking over a task or feeling concern for them; 帮 highlights helping. 替 may refer to only part of a task, and 帮 may involve doing it on the person’s behalf. Choose from the intended relationship rather than assuming help and substitution are mutually exclusive.
Should I use prepositional 较 in everyday spoken Chinese?
For ordinary spoken comparisons, 比 is usually the simpler choice. 较 often suits a written report or formal presentation. This is guidance about tone and familiarity, not a rule that using 较 in speech is ungrammatical.
Does this Level 5 classification guarantee what will appear on my specific test date?
No. The grouping of 替, 同1, and 较2 at Level 5 comes from the 2025-11 edition of the revised HSK syllabus outline (labeled for 2026-07 implementation), which defines our teaching scope here but does not guarantee which exam version a specific test center administers on a given date.
