Verb + 了 + Duration + Obj. (duration)

• Pinyin: le
• Formation: Subj. + Verb + 了 + Duration + Obj.

Meaning

This pattern uses 了 after the verb, followed by a duration phrase and an object, to express how long an action lasted. It indicates a completed action with a specific duration.

This structure is essential for stating how long you did something. The 了 here marks the completion of the action over the stated duration. If the object is a pronoun or contextually clear, it may be omitted. This pattern describes actions with a definite endpoint — the activity lasted for the stated duration and then stopped. Compare this with the double 了 pattern (Verb + 了 + Duration + 了), which indicates the action is still continuing. A common learner mistake is placing the duration after the object instead of between the verb and object.

Examples

1. 我学了三年中文。 I studied Chinese for three years.
2. 她看了两个小时电视。 She watched TV for two hours.
3. 他们等了半个小时公交车。 They waited for the bus for half an hour.

Usage Guide

Context: spoken, written, everyday

Tone: descriptive

Do Say

• 我们聊了一个下午天，都忘了吃饭。
• 她练了两个小时钢琴才休息。
• 他写了三天报告，终于写完了。

Don't Say

• 我学中文了三年。(The duration must come between 了 and the object — say 学了三年中文, not 学中文了三年) → 我学了三年中文。
• 她看了电视两个小时。(The duration should be placed before the object, not after — say 看了两个小时电视) → 她看了两个小时电视。

Origin & History

了 as an aspect particle traces back to the verb 了 (liǎo, meaning 'to finish'), which grammaticalized into a completion marker during the Song Dynasty. In this duration pattern, post-verbal 了 signals that the action was carried out over the specified time span.

Cultural Context

Generation: All ages

Social background: Universal