Bổ Ngữ Thời Lượng (Duration Complements) in Mandarin

Concept Overview

Bổ ngữ thời lượng (Duration Complement, 時量補語)
- Describes the length of time an action lasts/continues.
- Answers the implicit question “Trong bao lâu?” / “For how long?”.
- Functions as an adverbial complement following the verb, not as a noun phrase standing alone.

Basic affirmative template
- V +（了\,/过）+\text{BNTL} + O
- If the verb already carries an object, people or place information can appear between V and BNTL: V + O_{人/地点}+\text{BNTL}
Common markers that can appear immediately after the verb
- 了 (perfective, completed past within a given frame)
- 过 (experiential aspect, “have ever…”)
Placement summary
- Verb always precedes the time phrase.
- 了／过 is optional but highly frequent; omitting them usually moves the sentence toward a general/habitual reading rather than a specific event.

To keep both the object and the duration complement, Mandarin allows verb reduplication:
- V + O + V +（了\,/过）+\text{BNTL}
- Emphasises or clarifies the action and duration, avoids heavy post-modifier after a long object.
Example equivalency
- 我看了半个小时电影。≅ 我看电影看了半个小时。

Double 了 (one after verb, one at end of sentence)
- Signals an action that started in the past and is still continuing at the reference moment.
- Pattern: ……V 了 +\text{BNTL} + O 了
- Ex: 我看了半个小时电影了。“I’ve ALREADY been watching for half an hour (and I’m still watching).”
Verbs without inherent duration (瞬间动词; e.g. 结婚, 死, 开始)
- Cannot host a duration complement with 了／过 directly after them because the action itself is instantaneous.

Pattern: \text{Time span} + 没／没有 + V (+O)
- Focus shifts to how long something has not happened.
- Ex: 三天没写作业了。 “I haven’t done homework for three days (and counting).”

Mis-ordering: 了/过 must stay close to the verb.
Redundant time phrases: do not place two different duration expressions side by side unless one modifies another.
Instantaneous verbs + duration → change to a stative re-interpretation or replace with stative complement (e.g. 当老师当了十年 instead of 结婚结了三年).

昨天，他玩了一晚上游戏。
小明来北京一年了。
我等了他三个小时。
请你等一会儿。
我看了半天，也没看明白。
我来中国一年多了。
他做了几分钟就走了。
我等了他半天，他也没来。
我找你好几天了，你去哪儿了？
我上午看了半天电影。
我想听一会儿音乐。
我叫了他半天，他没有反应。
Verb-doubling sample: 我看电影看了半个小时。
Double-了 sample: 我看了半个小时电影了。
Non-durative note: 结婚 → 他们结婚了好几年。（OK） 结婚结了… （✗）
Experiential + duration: 他来过越南两年。“He has (at some point) stayed in VN for two years.”

Re-ordering / slot-filling (A,B,C,D) – identify correct location for a duration phrase inside a scrambled sentence.
- Ex 1: 我A没见B他C了，是不是D回国了。（好久）→ 我好久没见他了……
Multiple-choice completion – choose the grammatically valid sentence with duration complement.
- Q1 correct answer: B. 看了两个多小时电影。
- Q2 correct answer: B. 只睡了几个小时觉。
- Further questions emphasise word order, verb-object separation, placement of 了.
Negative pattern recognition – emphasises formula “time span + 没 + V”。

Connects to prior lessons on aspect markers 了, 过, 在: now adds quantified time to refine aspect.
Essential for narration: job history (当老师十多年), residency (来河内半年多), travel logs (待过北京一周).
Everyday conversation: making excuses (“我等了你半天”), persuading rest (“你已经看了好几个小时书了”), gauging waiting time (“他在外边整整等了你一天”).

Politeness & empathy: specifying duration can emphasise effort or sacrifice, e.g., 他在外边整整等了你一天 → triggers feelings of gratitude.
Time management: native speakers often omit object or verb repetition to sound concise; L2 learners should balance precision and natural brevity.