HSK 7
X了又Y， Y了又X
X liǎo yòu Y ， Y liǎo yòu X
Structure of repeated action: X了又Y， Y了又X
Explanation
X了又Y，Y了又X is a colloquial template (格式 gěshì) expressing a chain of actions repeated back and forth many times, often implying perseverance, meticulousness, or impatience.
verb X + 了 (le) + 又 (yòu) + verb Y，verb Y + 了 (le) + 又 (yòu) + verb X. 了 indicates the completion of one round, and 又 (yòu) means 'again', linking the repeated rounds.
In colloquial speech, when you want to emphasize an action occurring cyclically and continuously; X and Y are usually a pair of antonymous or related verbs (装/拆 assemble/disassemble, 写/擦 write/erase).
You must keep the correct interlocking pattern X了又Y，Y了又X (swapping the roles of the two verbs in the latter clause), not writing it as X了又Y，X了又Y; and each verb needs 了 after it, which cannot be omitted.
Examples
He assembled it and then took it apart, took it apart and then assembled it again, repairing it the whole day long.
The child wrote and then erased, erased and then wrote again, diligently practicing writing Chinese characters.
Practice
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Learn “X了又Y， Y了又X” effectively
The grammar point “X了又Y， Y了又X” (Structure of repeated action: X了又Y， Y了又X) is one of the key structures at HSK 7. To use it fluently, you need to understand the contexts where it's used and practice regularly.
Study tip: read the examples aloud many times to build a natural reflex. Then try making your own sentences for your own situations. Use the audio button to hear and practice accurate pronunciation.
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