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HSK 6 Frequency Adverbs: 一再 and 再三
一再 and 再三 both emphasize repetition. They overlap before many verbs of reminding, requesting or considering. Learn 一再考虑 alongside the established written pattern 考虑再三. 一再 is also a straightforward choice for repeated developments such as weather delays; choose by the whole expression rather than a mechanical human-subject test.
医生一再提醒他要注意休息。
一再 precedes a communicative verb (提醒) to show an action done multiple times.
× 我们考虑一再，决定明年再去留学。
Incorrect: 一再 cannot be placed after the verb 考虑. Replace it with 再三 as shown in “他犹豫再三，还是拒绝了这个邀请。”-corr, or move 一再 before the verb.
Corrected example: 我们考虑再三，决定明年再去留学。
Read the full explanation and examples
Core Meaning and Syllabus Scope
In the HSK 6 grammar outline, 一再 and 再三 are grouped together under frequency adverbs. Both words translate into English as 'repeatedly', 'again and again', or 'time and time again'. Unlike basic frequency adverbs such as 常常 or 经常, which describe regular habits over a long period, 一再 and 再三 highlight that a specific action, statement, or mental process happens multiple times within a particular situation.
Both words belong to a relatively formal or written register, though they are also common in serious spoken contexts such as news reports, workplace discussions, and earnest personal conversations. When a speaker wants to stress that a warning, request, apology, or promise was made more than once, either adverb can often fill the pre-verbal slot.
How to Use 一再
The adverb 一再 literally suggests 'once and then again'. It always precedes the verb or verb phrase it modifies. You will frequently see it paired with communicative verbs such as 强调 (to emphasize), 提醒 (to remind), 要求 (to demand), 表示 (to express), and 解释 (to explain).
医生一再提醒他要注意休息。
一再 precedes a communicative verb (提醒) to show an action done multiple times.
一再 can describe a repeated development without foregrounding a willing agent: delays, errors or missed opportunities are useful examples. Whether it sounds critical, frustrated or appreciative depends on context. The adverb itself does not make every repeated event undesirable.
由于天气原因，航班一再推迟。
一再推迟 is a natural model for repeated delays caused by weather. It reports recurrence without requiring the flight itself to act deliberately.
How to Use 再三
再三 emphasizes doing something repeatedly and often gives weight to consideration, urging, apology or thanks. It does not mean exactly three times, and the word alone does not prove sincerity. A grammatical subject can also represent people, as in 学校再三强调安全问题; it need not literally be an individual human.
老王再三向帮助过他的邻居表示感谢。
再三 precedes the prepositional phrase and verb phrase to emphasize sincere, deliberate repetition.
Established written combinations include 考虑再三, 思索再三, 犹豫再三 and 叮嘱再三. Learn these complete patterns rather than putting 再三 after every verb. 了 can also appear in an appropriate completed-action context, as in 他考虑了再三，终于作出了决定. For a longer object, 再三考虑这个问题 provides a clear pre-verbal learner model.
他犹豫再三，还是拒绝了这个邀请。
再三 is placed directly after the disyllabic mental verb 犹豫 to form a natural four-character clause.
Key Contrasts and Learner Mistakes
Both words occur before many speaking and thinking verbs, but their conventional phrasing differs. Compare the following models and use context to choose.
- Position: use 一再 before the modified verb. 再三 can also follow established thinking or reporting phrases, as in 考虑再三 or 考虑了再三. This is not a license to put it after every verb.
- Agency and wording: 再三 often emphasizes repeated consideration or communication. 一再 is a natural broad choice for repeated developments such as 航班一再推迟 and repeated errors such as 一再犯错. The grammatical subject’s animacy alone is not a sufficient test.
- Tone: 再三 can give emphasis to carefulness or insistence; 一再 stresses recurrence. Either may appear in a positive or critical account, and an adverb does not certify that a promise or apology is sincere.
In the sentence below, 考虑一再 is not the conventional post-verbal pattern. Use 考虑再三 or move 一再 before 考虑. Both repairs retain the decision to wait until next year for study abroad.
× 我们考虑一再，决定明年再去留学。
Incorrect: 一再 cannot be placed after the verb 考虑. Replace it with 再三 as shown in “他犹豫再三，还是拒绝了这个邀请。”-corr, or move 一再 before the verb.
Corrected example: 我们考虑再三，决定明年再去留学。
我们考虑再三，决定明年再去留学。
Correct replacement for “我们考虑一再，决定明年再去留学。”: 再三 can follow disyllabic mental verbs like 考虑.
Frequently asked questions
When can 一再 and 再三 be used interchangeably?
When they are placed before a deliberate communicative or mental verb with a human subject—such as 强调 (to emphasize), 叮嘱 (to urge), or 请求 (to request)—both adverbs are grammatical and mean 'repeatedly'. Even then, 再三 sounds slightly more careful or earnest, while 一再 simply stresses the high frequency of the action.
Can I use 再三 when someone repeatedly makes mistakes?
For ordinary descriptions of repeated mistakes, use 一再犯错 or 一再失误 as clear learner models. 再三 is familiar with repeated urging, consideration and communication. This is a guide to natural combinations, not a rule that one adverb can appear only in a positive story and the other only in a negative one.
How do 一再 and 再三 differ from 经常?
经常 summarizes frequency, while 一再 and 再三 emphasize recurrence of an action or act of communication. The time span alone does not decide: 这两天他经常打电话 can cover a short period, and 多年来他一再提出这个建议 can cover years. Choose the focus as well as the complete phrase.
