跑得快 vs 快跑 (pǎo de kuài vs kuài pǎo): complement of degree vs manner adverb
The difference between 跑得快 (pǎo de kuài) and 快跑 (kuài pǎo) hinges on grammatical structure and focus. 跑得快 uses the complement marker 得 to evaluate the degree or result of the running (how fast it is), while 快跑 places the adverb 快 before the verb to describe the manner of the action (to run quickly). Understanding when to use each is essential for accurate description versus command or habitual statement.
跑得快 and 快跑 both involve the adverb 快 and the verb 跑, but they serve different grammatical functions. 跑得快 is a verb-complement structure formed with 得, where 快 indicates the degree or result of the action; it is used to describe how fast someone runs, often as a predicate or comment. 快跑 is an adverb-verb phrase where 快 modifies the verb to indicate the manner of the action; it is commonly used in commands, instructions, or statements about habitual behavior. The key is identifying whether you are describing the speed (跑得快) or directing/describing the manner (快跑).
When to use each
Use 跑得快 to talk about the speed or degree of a running action as a result, often in descriptive statements. This structure requires 得 after the verb, and the complement can be modified (e.g., 很快). Negation places 不 after 得, as in 跑得不快. If the verb has an object, the verb must be repeated: 跑步跑得快.
The complement with 得 evaluates the action itself; it cannot be used directly as an imperative or to describe manner without 得.
Use 快跑 when the focus is on the manner of running—how the action is performed, often as a command or to describe habitual behavior. The adverb 快 comes directly before the verb. Negation is standard: 不快跑 (e.g., 他不快跑, meaning 'he doesn't run quickly'). It can also take 地: 快快地跑. This form is also used in instructions like '快跑！' (Run quickly!).
快跑 can imply volition, as in 'run fast' as an instruction or decision, while 跑得快 is neutral and evaluative.
At a glance
| 跑得快 | 快跑 | |
|---|---|---|
| Grammatical role | Verb + 得 + complement of degree | Adverb + verb |
| Focus | Result/degree of action (how fast it is) | Manner of action (to run quickly) |
| Common usage | Descriptive statement about speed | Command, instruction, or habitual manner |
| Negation | 跑得不快 | 不快跑 |
| Object handling | Verb must be repeated if object present (跑步跑得快) | Adverb directly before verb phrase (快跑步) |
| Imperative use | Not used for commands | Used for commands (快跑！) |
Examples
- 跑得快他跑得很快。Tā pǎo de hěn kuài.He runs very fast.Evaluates the speed of his running using the 得 complement.
- 跑得快我跑得不快。Wǒ pǎo de bù kuài.I don't run fast.Correct negation: 不 is placed after 得.
- 快跑快跑！Kuài pǎo!Run quickly!Imperative using adverb before verb.
- 快跑他不快跑，他慢跑。Tā bù kuài pǎo, tā màn pǎo.He doesn't run quickly; he jogs.Negation of the manner adverb is grammatically correct here.
- 跑得快他跑步跑得快，但是不喜欢快跑。Tā pǎobù pǎo de kuài, dànshì bù xǐhuān kuài pǎo.He runs fast (in races), but doesn't like to run quickly.Shows both structures: 跑得快 describes speed; 快跑 as a manner after 喜欢.
- 快跑她快快地跑走了。Tā kuài kuài de pǎo zǒu le.She ran away quickly.Adverb reduplicated with 地 to emphasize manner.
Common mistakes
- Using 快跑 as a complement: '他跑快' should be '他跑得快' (missing 得).
- Using 跑得快 as an adverb: '他跑得快跑' is incorrect; restructure as '他快跑' or use 地.
- Negating 跑得快 incorrectly: '他不跑得快' is wrong; the correct form is '他跑得不快'.
- Assuming negation of 快跑 is always ungrammatical: '他不快跑' is fine when describing habitual manner (e.g., '他不快跑，他慢跑').
- Placing 快 after the verb without 得 in a descriptive sense: '他跑快' is not standard for 'he runs fast'.
FAQ
- When do I use 跑得快 vs 快跑?
- Use 跑得快 to describe the speed of running as a result or comment (e.g., 他跑得很快). Use 快跑 to indicate the manner of running, especially in commands or when stating how someone habitually runs (e.g., 快跑！ or 他不快跑).
- Can I use '跑快' to mean 'run fast'?
- No, '跑快' is not standard Chinese for 'run fast'. If you mean to describe the speed, you need the 得 complement: 跑得快. '跑快' may appear in some set phrases (like 跑快车) but not as a general evaluative complement.
- Is '他不快跑' grammatically correct?
- Yes, it is correct in appropriate contexts. It means 'he doesn't run quickly' and is a negation of the manner adverb. For example, '他不快跑，他慢跑' is natural. However, it is not used to negate a specific instance of fast running; for that you would use 跑得不快.
- How do I negate a 得 complement?
- Place 不 between 得 and the complement, not after the verb. For example, '他跑得不快' (he doesn't run fast). Do not say '他不跑得快'.