动量补语
Curiosity
In "I watched this movie three times," where does "three times" go? After the verb like a duration?
Intuition
A frequency complement counts "how many times" and attaches after the verb. It is the twin of duration (how long); both sit after the verb and before the object.
Visualization
Reorder the English-like [I][watch][movie][three times] into Chinese [I][watch-guo][three times][movie]. The frequency moves before the object.
Essence
Verb + (le/guo) + frequency + object. Measure words: ci (most general), bian (from start to finish), tang (a round trip), xia (a light action). If the object is a pronoun, it precedes the frequency (kan le ta yi yan, "glanced at him once"). It shares the position and logic of the duration complement.
Examples
Mini-quiz
Which has the correct order for "I read that book twice"?